Home / 15,659.20-21,609.28-9,285.76

Finding the Fourth Proportional to 15,659.20, 21,609.28 and 9,285.76

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Solution

The fourth proportional to 15,659.20, 21,609.28 and 9,285.76 is: 12,814.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.20 : 21,609.28 = 9,285.76 : x
  2. Step 2: Convert to fraction form
    15,659.20/21,609.28 = 9,285.76/x
  3. Step 3: Cross multiply
    15,659.20x = 21,609.28 × 9,285.76
  4. Step 4: Simplify right side
    15,659.20x = 200,658,587.85
  5. Step 5: Solve for x
    x = 200,658,587.85/15,659.20
  6. Step 6: Final answer
    x = 12,814.10

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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.