Home / 15,140.13-20,887.58-11,170.71

Finding the Fourth Proportional to 15,140.13, 20,887.58 and 11,170.71

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Solution

The fourth proportional to 15,140.13, 20,887.58 and 11,170.71 is: 15,411.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.13 : 20,887.58 = 11,170.71 : x
  2. Step 2: Convert to fraction form
    15,140.13/20,887.58 = 11,170.71/x
  3. Step 3: Cross multiply
    15,140.13x = 20,887.58 × 11,170.71
  4. Step 4: Simplify right side
    15,140.13x = 233,329,042.93
  5. Step 5: Solve for x
    x = 233,329,042.93/15,140.13
  6. Step 6: Final answer
    x = 15,411.30

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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.