Home / 21,115.92-29,140.05-11,555.62

Finding the Fourth Proportional to 21,115.92, 29,140.05 and 11,555.62

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Solution

The fourth proportional to 21,115.92, 29,140.05 and 11,555.62 is: 15,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.92 : 29,140.05 = 11,555.62 : x
  2. Step 2: Convert to fraction form
    21,115.92/29,140.05 = 11,555.62/x
  3. Step 3: Cross multiply
    21,115.92x = 29,140.05 × 11,555.62
  4. Step 4: Simplify right side
    21,115.92x = 336,731,344.58
  5. Step 5: Solve for x
    x = 336,731,344.58/21,115.92
  6. Step 6: Final answer
    x = 15,946.80

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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.