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Finding the Fourth Proportional to 18,700.40, 28,064.50 and 8,842.70

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Solution

The fourth proportional to 18,700.40, 28,064.50 and 8,842.70 is: 13,270.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.40 : 28,064.50 = 8,842.70 : x
  2. Step 2: Convert to fraction form
    18,700.40/28,064.50 = 8,842.70/x
  3. Step 3: Cross multiply
    18,700.40x = 28,064.50 × 8,842.70
  4. Step 4: Simplify right side
    18,700.40x = 248,165,954.15
  5. Step 5: Solve for x
    x = 248,165,954.15/18,700.40
  6. Step 6: Final answer
    x = 13,270.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.