Home / 15,909.78-21,957.51-9,622.14

Finding the Fourth Proportional to 15,909.78, 21,957.51 and 9,622.14

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Solution

The fourth proportional to 15,909.78, 21,957.51 and 9,622.14 is: 13,279.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.78 : 21,957.51 = 9,622.14 : x
  2. Step 2: Convert to fraction form
    15,909.78/21,957.51 = 9,622.14/x
  3. Step 3: Cross multiply
    15,909.78x = 21,957.51 × 9,622.14
  4. Step 4: Simplify right side
    15,909.78x = 211,278,235.27
  5. Step 5: Solve for x
    x = 211,278,235.27/15,909.78
  6. Step 6: Final answer
    x = 13,279.77

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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.