Home / 13,149.64-18,121.38-9,417.16

Finding the Fourth Proportional to 13,149.64, 18,121.38 and 9,417.16

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Solution

The fourth proportional to 13,149.64, 18,121.38 and 9,417.16 is: 12,977.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.64 : 18,121.38 = 9,417.16 : x
  2. Step 2: Convert to fraction form
    13,149.64/18,121.38 = 9,417.16/x
  3. Step 3: Cross multiply
    13,149.64x = 18,121.38 × 9,417.16
  4. Step 4: Simplify right side
    13,149.64x = 170,651,934.88
  5. Step 5: Solve for x
    x = 170,651,934.88/13,149.64
  6. Step 6: Final answer
    x = 12,977.69

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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.