Home / 10,981.31-15,156.36-8,586.55

Finding the Fourth Proportional to 10,981.31, 15,156.36 and 8,586.55

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Solution

The fourth proportional to 10,981.31, 15,156.36 and 8,586.55 is: 11,851.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.31 : 15,156.36 = 8,586.55 : x
  2. Step 2: Convert to fraction form
    10,981.31/15,156.36 = 8,586.55/x
  3. Step 3: Cross multiply
    10,981.31x = 15,156.36 × 8,586.55
  4. Step 4: Simplify right side
    10,981.31x = 130,140,842.96
  5. Step 5: Solve for x
    x = 130,140,842.96/10,981.31
  6. Step 6: Final answer
    x = 11,851.12

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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.