Home / 21,988.36-32,990.46-13,656.52

Finding the Fourth Proportional to 21,988.36, 32,990.46 and 13,656.52

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Solution

The fourth proportional to 21,988.36, 32,990.46 and 13,656.52 is: 20,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.36 : 32,990.46 = 13,656.52 : x
  2. Step 2: Convert to fraction form
    21,988.36/32,990.46 = 13,656.52/x
  3. Step 3: Cross multiply
    21,988.36x = 32,990.46 × 13,656.52
  4. Step 4: Simplify right side
    21,988.36x = 450,534,876.80
  5. Step 5: Solve for x
    x = 450,534,876.80/21,988.36
  6. Step 6: Final answer
    x = 20,489.70

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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.