Home / 28,130.72-38,817.48-16,191.68

Finding the Fourth Proportional to 28,130.72, 38,817.48 and 16,191.68

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Solution

The fourth proportional to 28,130.72, 38,817.48 and 16,191.68 is: 22,342.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.72 : 38,817.48 = 16,191.68 : x
  2. Step 2: Convert to fraction form
    28,130.72/38,817.48 = 16,191.68/x
  3. Step 3: Cross multiply
    28,130.72x = 38,817.48 × 16,191.68
  4. Step 4: Simplify right side
    28,130.72x = 628,520,214.57
  5. Step 5: Solve for x
    x = 628,520,214.57/28,130.72
  6. Step 6: Final answer
    x = 22,342.84

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Half scale
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Double scale
Find fourth proportional to 28,131.72, 38,818.86 and 16,192.68
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.