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Finding the Fourth Proportional to 21,358.56, 32,042.88 and 7,319.28

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Solution

The fourth proportional to 21,358.56, 32,042.88 and 7,319.28 is: 10,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,358.56 : 32,042.88 = 7,319.28 : x
  2. Step 2: Convert to fraction form
    21,358.56/32,042.88 = 7,319.28/x
  3. Step 3: Cross multiply
    21,358.56x = 32,042.88 × 7,319.28
  4. Step 4: Simplify right side
    21,358.56x = 234,530,810.73
  5. Step 5: Solve for x
    x = 234,530,810.73/21,358.56
  6. Step 6: Final answer
    x = 10,980.65

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1.5x scale

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.