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Finding the Fourth Proportional to 21,552.40, 32,400.60 and 18,701.20

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Solution

The fourth proportional to 21,552.40, 32,400.60 and 18,701.20 is: 28,114.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,552.40 : 32,400.60 = 18,701.20 : x
  2. Step 2: Convert to fraction form
    21,552.40/32,400.60 = 18,701.20/x
  3. Step 3: Cross multiply
    21,552.40x = 32,400.60 × 18,701.20
  4. Step 4: Simplify right side
    21,552.40x = 605,930,100.72
  5. Step 5: Solve for x
    x = 605,930,100.72/21,552.40
  6. Step 6: Final answer
    x = 28,114.28

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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.