Home / 10,980.31-15,154.98-8,585.55

Finding the Fourth Proportional to 10,980.31, 15,154.98 and 8,585.55

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Solution

The fourth proportional to 10,980.31, 15,154.98 and 8,585.55 is: 11,849.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,980.31 : 15,154.98 = 8,585.55 : x
  2. Step 2: Convert to fraction form
    10,980.31/15,154.98 = 8,585.55/x
  3. Step 3: Cross multiply
    10,980.31x = 15,154.98 × 8,585.55
  4. Step 4: Simplify right side
    10,980.31x = 130,113,719.84
  5. Step 5: Solve for x
    x = 130,113,719.84/10,980.31
  6. Step 6: Final answer
    x = 11,849.73

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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.