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Finding the Fourth Proportional to 21,555.72, 32,348.48 and 7,515.88

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Solution

The fourth proportional to 21,555.72, 32,348.48 and 7,515.88 is: 11,279.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.72 : 32,348.48 = 7,515.88 : x
  2. Step 2: Convert to fraction form
    21,555.72/32,348.48 = 7,515.88/x
  3. Step 3: Cross multiply
    21,555.72x = 32,348.48 × 7,515.88
  4. Step 4: Simplify right side
    21,555.72x = 243,127,293.86
  5. Step 5: Solve for x
    x = 243,127,293.86/21,555.72
  6. Step 6: Final answer
    x = 11,279.02

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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.