Home / 31,366.20-43,278.20-18,612.79

Finding the Fourth Proportional to 31,366.20, 43,278.20 and 18,612.79

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Solution

The fourth proportional to 31,366.20, 43,278.20 and 18,612.79 is: 25,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,366.20 : 43,278.20 = 18,612.79 : x
  2. Step 2: Convert to fraction form
    31,366.20/43,278.20 = 18,612.79/x
  3. Step 3: Cross multiply
    31,366.20x = 43,278.20 × 18,612.79
  4. Step 4: Simplify right side
    31,366.20x = 805,528,048.18
  5. Step 5: Solve for x
    x = 805,528,048.18/31,366.20
  6. Step 6: Final answer
    x = 25,681.40

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Double scale
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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.