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Finding the Fourth Proportional to 21,808.68, 32,708.08 and 8,657.52

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Solution

The fourth proportional to 21,808.68, 32,708.08 and 8,657.52 is: 12,984.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.68 : 32,708.08 = 8,657.52 : x
  2. Step 2: Convert to fraction form
    21,808.68/32,708.08 = 8,657.52/x
  3. Step 3: Cross multiply
    21,808.68x = 32,708.08 × 8,657.52
  4. Step 4: Simplify right side
    21,808.68x = 283,170,856.76
  5. Step 5: Solve for x
    x = 283,170,856.76/21,808.68
  6. Step 6: Final answer
    x = 12,984.32

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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.