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Finding the Fourth Proportional to 21,402.92, 32,110.28 and 8,928.80

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Solution

The fourth proportional to 21,402.92, 32,110.28 and 8,928.80 is: 13,395.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.92 : 32,110.28 = 8,928.80 : x
  2. Step 2: Convert to fraction form
    21,402.92/32,110.28 = 8,928.80/x
  3. Step 3: Cross multiply
    21,402.92x = 32,110.28 × 8,928.80
  4. Step 4: Simplify right side
    21,402.92x = 286,706,223.42
  5. Step 5: Solve for x
    x = 286,706,223.42/21,402.92
  6. Step 6: Final answer
    x = 13,395.66

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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.