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Finding the Fourth Proportional to 18,230, 25,151.64 and 11,152.88

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Solution

The fourth proportional to 18,230, 25,151.64 and 11,152.88 is: 15,387.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,230 : 25,151.64 = 11,152.88 : x
  2. Step 2: Convert to fraction form
    18,230/25,151.64 = 11,152.88/x
  3. Step 3: Cross multiply
    18,230x = 25,151.64 × 11,152.88
  4. Step 4: Simplify right side
    18,230x = 280,513,222.72
  5. Step 5: Solve for x
    x = 280,513,222.72/18,230
  6. Step 6: Final answer
    x = 15,387.45

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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.