Home / 15,325.80-21,149.28-9,040.20

Finding the Fourth Proportional to 15,325.80, 21,149.28 and 9,040.20

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Solution

The fourth proportional to 15,325.80, 21,149.28 and 9,040.20 is: 12,475.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,325.80 : 21,149.28 = 9,040.20 : x
  2. Step 2: Convert to fraction form
    15,325.80/21,149.28 = 9,040.20/x
  3. Step 3: Cross multiply
    15,325.80x = 21,149.28 × 9,040.20
  4. Step 4: Simplify right side
    15,325.80x = 191,193,721.06
  5. Step 5: Solve for x
    x = 191,193,721.06/15,325.80
  6. Step 6: Final answer
    x = 12,475.28

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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.