Home / 20,342.96-28,073.76-11,390.24

Finding the Fourth Proportional to 20,342.96, 28,073.76 and 11,390.24

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Solution

The fourth proportional to 20,342.96, 28,073.76 and 11,390.24 is: 15,718.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.96 : 28,073.76 = 11,390.24 : x
  2. Step 2: Convert to fraction form
    20,342.96/28,073.76 = 11,390.24/x
  3. Step 3: Cross multiply
    20,342.96x = 28,073.76 × 11,390.24
  4. Step 4: Simplify right side
    20,342.96x = 319,766,864.10
  5. Step 5: Solve for x
    x = 319,766,864.10/20,342.96
  6. Step 6: Final answer
    x = 15,718.80

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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.