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Finding the Fourth Proportional to 18,711, 28,071.12 and 5,563.32

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Solution

The fourth proportional to 18,711, 28,071.12 and 5,563.32 is: 8,346.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711 : 28,071.12 = 5,563.32 : x
  2. Step 2: Convert to fraction form
    18,711/28,071.12 = 5,563.32/x
  3. Step 3: Cross multiply
    18,711x = 28,071.12 × 5,563.32
  4. Step 4: Simplify right side
    18,711x = 156,168,538.91
  5. Step 5: Solve for x
    x = 156,168,538.91/18,711
  6. Step 6: Final answer
    x = 8,346.35

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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.