Home / 15,279.18-21,080.28-8,904.31

Finding the Fourth Proportional to 15,279.18, 21,080.28 and 8,904.31

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Solution

The fourth proportional to 15,279.18, 21,080.28 and 8,904.31 is: 12,285.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.18 : 21,080.28 = 8,904.31 : x
  2. Step 2: Convert to fraction form
    15,279.18/21,080.28 = 8,904.31/x
  3. Step 3: Cross multiply
    15,279.18x = 21,080.28 × 8,904.31
  4. Step 4: Simplify right side
    15,279.18x = 187,705,289.15
  5. Step 5: Solve for x
    x = 187,705,289.15/15,279.18
  6. Step 6: Final answer
    x = 12,285.04

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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.