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Finding the Fourth Proportional to 18,419.72, 25,419.54 and 10,462.16

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Solution

The fourth proportional to 18,419.72, 25,419.54 and 10,462.16 is: 14,437.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.72 : 25,419.54 = 10,462.16 : x
  2. Step 2: Convert to fraction form
    18,419.72/25,419.54 = 10,462.16/x
  3. Step 3: Cross multiply
    18,419.72x = 25,419.54 × 10,462.16
  4. Step 4: Simplify right side
    18,419.72x = 265,943,294.61
  5. Step 5: Solve for x
    x = 265,943,294.61/18,419.72
  6. Step 6: Final answer
    x = 14,437.97

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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.