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Finding the Fourth Proportional to 18,711.13, 28,051.98 and 9,346.32

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Solution

The fourth proportional to 18,711.13, 28,051.98 and 9,346.32 is: 14,012.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.13 : 28,051.98 = 9,346.32 : x
  2. Step 2: Convert to fraction form
    18,711.13/28,051.98 = 9,346.32/x
  3. Step 3: Cross multiply
    18,711.13x = 28,051.98 × 9,346.32
  4. Step 4: Simplify right side
    18,711.13x = 262,182,641.45
  5. Step 5: Solve for x
    x = 262,182,641.45/18,711.13
  6. Step 6: Final answer
    x = 14,012.12

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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.