Home / 31,117.47-42,940.39-17,686.86

Finding the Fourth Proportional to 31,117.47, 42,940.39 and 17,686.86

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Solution

The fourth proportional to 31,117.47, 42,940.39 and 17,686.86 is: 24,406.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,117.47 : 42,940.39 = 17,686.86 : x
  2. Step 2: Convert to fraction form
    31,117.47/42,940.39 = 17,686.86/x
  3. Step 3: Cross multiply
    31,117.47x = 42,940.39 × 17,686.86
  4. Step 4: Simplify right side
    31,117.47x = 759,480,666.28
  5. Step 5: Solve for x
    x = 759,480,666.28/31,117.47
  6. Step 6: Final answer
    x = 24,406.89

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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.