Home / 12,447.86-17,177.90-7,143.51

Finding the Fourth Proportional to 12,447.86, 17,177.90 and 7,143.51

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Solution

The fourth proportional to 12,447.86, 17,177.90 and 7,143.51 is: 9,857.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,447.86 : 17,177.90 = 7,143.51 : x
  2. Step 2: Convert to fraction form
    12,447.86/17,177.90 = 7,143.51/x
  3. Step 3: Cross multiply
    12,447.86x = 17,177.90 × 7,143.51
  4. Step 4: Simplify right side
    12,447.86x = 122,710,464.71
  5. Step 5: Solve for x
    x = 122,710,464.71/12,447.86
  6. Step 6: Final answer
    x = 9,857.96

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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.