Home / 15,710.20-21,683.80-8,999.69

Finding the Fourth Proportional to 15,710.20, 21,683.80 and 8,999.69

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Solution

The fourth proportional to 15,710.20, 21,683.80 and 8,999.69 is: 12,421.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.20 : 21,683.80 = 8,999.69 : x
  2. Step 2: Convert to fraction form
    15,710.20/21,683.80 = 8,999.69/x
  3. Step 3: Cross multiply
    15,710.20x = 21,683.80 × 8,999.69
  4. Step 4: Simplify right side
    15,710.20x = 195,147,478.02
  5. Step 5: Solve for x
    x = 195,147,478.02/15,710.20
  6. Step 6: Final answer
    x = 12,421.71

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Half scale
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Double scale
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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.