Home / 12,417.64-17,143.40-9,891.66

Finding the Fourth Proportional to 12,417.64, 17,143.40 and 9,891.66

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Solution

The fourth proportional to 12,417.64, 17,143.40 and 9,891.66 is: 13,656.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,417.64 : 17,143.40 = 9,891.66 : x
  2. Step 2: Convert to fraction form
    12,417.64/17,143.40 = 9,891.66/x
  3. Step 3: Cross multiply
    12,417.64x = 17,143.40 × 9,891.66
  4. Step 4: Simplify right side
    12,417.64x = 169,576,684.04
  5. Step 5: Solve for x
    x = 169,576,684.04/12,417.64
  6. Step 6: Final answer
    x = 13,656.11

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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.