Home / 20,337.36-28,068.20-11,386.72

Finding the Fourth Proportional to 20,337.36, 28,068.20 and 11,386.72

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Solution

The fourth proportional to 20,337.36, 28,068.20 and 11,386.72 is: 15,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,337.36 : 28,068.20 = 11,386.72 : x
  2. Step 2: Convert to fraction form
    20,337.36/28,068.20 = 11,386.72/x
  3. Step 3: Cross multiply
    20,337.36x = 28,068.20 × 11,386.72
  4. Step 4: Simplify right side
    20,337.36x = 319,604,607.20
  5. Step 5: Solve for x
    x = 319,604,607.20/20,337.36
  6. Step 6: Final answer
    x = 15,715.15

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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.