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Finding the Fourth Proportional to 21,990.80, 32,921.40 and 14,603.60

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Solution

The fourth proportional to 21,990.80, 32,921.40 and 14,603.60 is: 21,862.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.80 : 32,921.40 = 14,603.60 : x
  2. Step 2: Convert to fraction form
    21,990.80/32,921.40 = 14,603.60/x
  3. Step 3: Cross multiply
    21,990.80x = 32,921.40 × 14,603.60
  4. Step 4: Simplify right side
    21,990.80x = 480,770,957.04
  5. Step 5: Solve for x
    x = 480,770,957.04/21,990.80
  6. Step 6: Final answer
    x = 21,862.37

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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.