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Finding the Fourth Proportional to 18,602.08, 28,031 and 15,387.19

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Solution

The fourth proportional to 18,602.08, 28,031 and 15,387.19 is: 23,186.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,602.08 : 28,031 = 15,387.19 : x
  2. Step 2: Convert to fraction form
    18,602.08/28,031 = 15,387.19/x
  3. Step 3: Cross multiply
    18,602.08x = 28,031 × 15,387.19
  4. Step 4: Simplify right side
    18,602.08x = 431,318,322.89
  5. Step 5: Solve for x
    x = 431,318,322.89/18,602.08
  6. Step 6: Final answer
    x = 23,186.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.