Home / 31,145.61-42,981.27-16,998.69

Finding the Fourth Proportional to 31,145.61, 42,981.27 and 16,998.69

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Solution

The fourth proportional to 31,145.61, 42,981.27 and 16,998.69 is: 23,458.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,145.61 : 42,981.27 = 16,998.69 : x
  2. Step 2: Convert to fraction form
    31,145.61/42,981.27 = 16,998.69/x
  3. Step 3: Cross multiply
    31,145.61x = 42,981.27 × 16,998.69
  4. Step 4: Simplify right side
    31,145.61x = 730,625,284.54
  5. Step 5: Solve for x
    x = 730,625,284.54/31,145.61
  6. Step 6: Final answer
    x = 23,458.37

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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.