Home / 31,146.39-42,976.95-18,397.81

Finding the Fourth Proportional to 31,146.39, 42,976.95 and 18,397.81

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Solution

The fourth proportional to 31,146.39, 42,976.95 and 18,397.81 is: 25,385.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,146.39 : 42,976.95 = 18,397.81 : x
  2. Step 2: Convert to fraction form
    31,146.39/42,976.95 = 18,397.81/x
  3. Step 3: Cross multiply
    31,146.39x = 42,976.95 × 18,397.81
  4. Step 4: Simplify right side
    31,146.39x = 790,681,653.04
  5. Step 5: Solve for x
    x = 790,681,653.04/31,146.39
  6. Step 6: Final answer
    x = 25,385.98

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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.