Home / 31,398.50-43,310.70-18,643.02

Finding the Fourth Proportional to 31,398.50, 43,310.70 and 18,643.02

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Solution

The fourth proportional to 31,398.50, 43,310.70 and 18,643.02 is: 25,715.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,398.50 : 43,310.70 = 18,643.02 : x
  2. Step 2: Convert to fraction form
    31,398.50/43,310.70 = 18,643.02/x
  3. Step 3: Cross multiply
    31,398.50x = 43,310.70 × 18,643.02
  4. Step 4: Simplify right side
    31,398.50x = 807,442,246.31
  5. Step 5: Solve for x
    x = 807,442,246.31/31,398.50
  6. Step 6: Final answer
    x = 25,715.95

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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.