Home / 21,521.28-32,272-11,140.32

Finding the Fourth Proportional to 21,521.28, 32,272 and 11,140.32

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Solution

The fourth proportional to 21,521.28, 32,272 and 11,140.32 is: 16,705.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.28 : 32,272 = 11,140.32 : x
  2. Step 2: Convert to fraction form
    21,521.28/32,272 = 11,140.32/x
  3. Step 3: Cross multiply
    21,521.28x = 32,272 × 11,140.32
  4. Step 4: Simplify right side
    21,521.28x = 359,520,407.04
  5. Step 5: Solve for x
    x = 359,520,407.04/21,521.28
  6. Step 6: Final answer
    x = 16,705.34

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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.