Home / 20,639.98-28,483.88-11,565.73

Finding the Fourth Proportional to 20,639.98, 28,483.88 and 11,565.73

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Solution

The fourth proportional to 20,639.98, 28,483.88 and 11,565.73 is: 15,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.98 : 28,483.88 = 11,565.73 : x
  2. Step 2: Convert to fraction form
    20,639.98/28,483.88 = 11,565.73/x
  3. Step 3: Cross multiply
    20,639.98x = 28,483.88 × 11,565.73
  4. Step 4: Simplify right side
    20,639.98x = 329,436,802.18
  5. Step 5: Solve for x
    x = 329,436,802.18/20,639.98
  6. Step 6: Final answer
    x = 15,961.10

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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.