Home / 21,219.48-29,269.62-15,158.52

Finding the Fourth Proportional to 21,219.48, 29,269.62 and 15,158.52

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Solution

The fourth proportional to 21,219.48, 29,269.62 and 15,158.52 is: 20,909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.48 : 29,269.62 = 15,158.52 : x
  2. Step 2: Convert to fraction form
    21,219.48/29,269.62 = 15,158.52/x
  3. Step 3: Cross multiply
    21,219.48x = 29,269.62 × 15,158.52
  4. Step 4: Simplify right side
    21,219.48x = 443,684,120.16
  5. Step 5: Solve for x
    x = 443,684,120.16/21,219.48
  6. Step 6: Final answer
    x = 20,909.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.