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Finding the Fourth Proportional to 15,640.64, 21,585.24 and 10,326.24

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Solution

The fourth proportional to 15,640.64, 21,585.24 and 10,326.24 is: 14,250.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640.64 : 21,585.24 = 10,326.24 : x
  2. Step 2: Convert to fraction form
    15,640.64/21,585.24 = 10,326.24/x
  3. Step 3: Cross multiply
    15,640.64x = 21,585.24 × 10,326.24
  4. Step 4: Simplify right side
    15,640.64x = 222,894,368.70
  5. Step 5: Solve for x
    x = 222,894,368.70/15,640.64
  6. Step 6: Final answer
    x = 14,250.97

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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.