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Finding the Fourth Proportional to 21,487.57, 32,220.90 and 7,448.40

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Solution

The fourth proportional to 21,487.57, 32,220.90 and 7,448.40 is: 11,168.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.57 : 32,220.90 = 7,448.40 : x
  2. Step 2: Convert to fraction form
    21,487.57/32,220.90 = 7,448.40/x
  3. Step 3: Cross multiply
    21,487.57x = 32,220.90 × 7,448.40
  4. Step 4: Simplify right side
    21,487.57x = 239,994,151.56
  5. Step 5: Solve for x
    x = 239,994,151.56/21,487.57
  6. Step 6: Final answer
    x = 11,168.98

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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.