Home / 10,985.38-15,159.20-6,509.56

Finding the Fourth Proportional to 10,985.38, 15,159.20 and 6,509.56

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Solution

The fourth proportional to 10,985.38, 15,159.20 and 6,509.56 is: 8,982.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.38 : 15,159.20 = 6,509.56 : x
  2. Step 2: Convert to fraction form
    10,985.38/15,159.20 = 6,509.56/x
  3. Step 3: Cross multiply
    10,985.38x = 15,159.20 × 6,509.56
  4. Step 4: Simplify right side
    10,985.38x = 98,679,721.95
  5. Step 5: Solve for x
    x = 98,679,721.95/10,985.38
  6. Step 6: Final answer
    x = 8,982.82

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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.