Home / 20,948.61-28,909.65-11,389.14

Finding the Fourth Proportional to 20,948.61, 28,909.65 and 11,389.14

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Solution

The fourth proportional to 20,948.61, 28,909.65 and 11,389.14 is: 15,717.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.61 : 28,909.65 = 11,389.14 : x
  2. Step 2: Convert to fraction form
    20,948.61/28,909.65 = 11,389.14/x
  3. Step 3: Cross multiply
    20,948.61x = 28,909.65 × 11,389.14
  4. Step 4: Simplify right side
    20,948.61x = 329,256,051.20
  5. Step 5: Solve for x
    x = 329,256,051.20/20,948.61
  6. Step 6: Final answer
    x = 15,717.32

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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.