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Finding the Fourth Proportional to 18,397.19, 25,387.42 and 10,438.94

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Solution

The fourth proportional to 18,397.19, 25,387.42 and 10,438.94 is: 14,405.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,397.19 : 25,387.42 = 10,438.94 : x
  2. Step 2: Convert to fraction form
    18,397.19/25,387.42 = 10,438.94/x
  3. Step 3: Cross multiply
    18,397.19x = 25,387.42 × 10,438.94
  4. Step 4: Simplify right side
    18,397.19x = 265,017,728.04
  5. Step 5: Solve for x
    x = 265,017,728.04/18,397.19
  6. Step 6: Final answer
    x = 14,405.34

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Half scale
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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.