Home / 15,474.40-21,340.92-12,489.28

Finding the Fourth Proportional to 15,474.40, 21,340.92 and 12,489.28

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Solution

The fourth proportional to 15,474.40, 21,340.92 and 12,489.28 is: 17,224.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,474.40 : 21,340.92 = 12,489.28 : x
  2. Step 2: Convert to fraction form
    15,474.40/21,340.92 = 12,489.28/x
  3. Step 3: Cross multiply
    15,474.40x = 21,340.92 × 12,489.28
  4. Step 4: Simplify right side
    15,474.40x = 266,532,725.34
  5. Step 5: Solve for x
    x = 266,532,725.34/15,474.40
  6. Step 6: Final answer
    x = 17,224.11

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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.