Home / 15,229.06-21,017.12-8,515.89

Finding the Fourth Proportional to 15,229.06, 21,017.12 and 8,515.89

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Solution

The fourth proportional to 15,229.06, 21,017.12 and 8,515.89 is: 11,752.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,229.06 : 21,017.12 = 8,515.89 : x
  2. Step 2: Convert to fraction form
    15,229.06/21,017.12 = 8,515.89/x
  3. Step 3: Cross multiply
    15,229.06x = 21,017.12 × 8,515.89
  4. Step 4: Simplify right side
    15,229.06x = 178,979,439.46
  5. Step 5: Solve for x
    x = 178,979,439.46/15,229.06
  6. Step 6: Final answer
    x = 11,752.50

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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.