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Finding the Fourth Proportional to 18,881.42, 28,450.03 and 15,666.53

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Solution

The fourth proportional to 18,881.42, 28,450.03 and 15,666.53 is: 23,605.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.42 : 28,450.03 = 15,666.53 : x
  2. Step 2: Convert to fraction form
    18,881.42/28,450.03 = 15,666.53/x
  3. Step 3: Cross multiply
    18,881.42x = 28,450.03 × 15,666.53
  4. Step 4: Simplify right side
    18,881.42x = 445,713,248.50
  5. Step 5: Solve for x
    x = 445,713,248.50/18,881.42
  6. Step 6: Final answer
    x = 23,605.92

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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.