Home / 21,999.28-32,990.80-9,521.12

Finding the Fourth Proportional to 21,999.28, 32,990.80 and 9,521.12

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Solution

The fourth proportional to 21,999.28, 32,990.80 and 9,521.12 is: 14,278.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.28 : 32,990.80 = 9,521.12 : x
  2. Step 2: Convert to fraction form
    21,999.28/32,990.80 = 9,521.12/x
  3. Step 3: Cross multiply
    21,999.28x = 32,990.80 × 9,521.12
  4. Step 4: Simplify right side
    21,999.28x = 314,109,365.70
  5. Step 5: Solve for x
    x = 314,109,365.70/21,999.28
  6. Step 6: Final answer
    x = 14,278.17

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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.