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Finding the Fourth Proportional to 21,856.57, 32,779.42 and 9,375.18

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Solution

The fourth proportional to 21,856.57, 32,779.42 and 9,375.18 is: 14,060.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856.57 : 32,779.42 = 9,375.18 : x
  2. Step 2: Convert to fraction form
    21,856.57/32,779.42 = 9,375.18/x
  3. Step 3: Cross multiply
    21,856.57x = 32,779.42 × 9,375.18
  4. Step 4: Simplify right side
    21,856.57x = 307,312,816.43
  5. Step 5: Solve for x
    x = 307,312,816.43/21,856.57
  6. Step 6: Final answer
    x = 14,060.43

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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.