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Finding the Fourth Proportional to 15,480.87, 21,364.02 and 9,107.88

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Solution

The fourth proportional to 15,480.87, 21,364.02 and 9,107.88 is: 12,569.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,480.87 : 21,364.02 = 9,107.88 : x
  2. Step 2: Convert to fraction form
    15,480.87/21,364.02 = 9,107.88/x
  3. Step 3: Cross multiply
    15,480.87x = 21,364.02 × 9,107.88
  4. Step 4: Simplify right side
    15,480.87x = 194,580,930.48
  5. Step 5: Solve for x
    x = 194,580,930.48/15,480.87
  6. Step 6: Final answer
    x = 12,569.12

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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.