Home / 21,520.47-32,280.53-12,749.07

Finding the Fourth Proportional to 21,520.47, 32,280.53 and 12,749.07

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Solution

The fourth proportional to 21,520.47, 32,280.53 and 12,749.07 is: 19,123.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.47 : 32,280.53 = 12,749.07 : x
  2. Step 2: Convert to fraction form
    21,520.47/32,280.53 = 12,749.07/x
  3. Step 3: Cross multiply
    21,520.47x = 32,280.53 × 12,749.07
  4. Step 4: Simplify right side
    21,520.47x = 411,546,672.86
  5. Step 5: Solve for x
    x = 411,546,672.86/21,520.47
  6. Step 6: Final answer
    x = 19,123.50

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Half scale
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Double scale
Find fourth proportional to 21,521.47, 32,282.02 and 12,750.07
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.