Home / 31,690.40-43,730.76-18,597.20

Finding the Fourth Proportional to 31,690.40, 43,730.76 and 18,597.20

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Solution

The fourth proportional to 31,690.40, 43,730.76 and 18,597.20 is: 25,662.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.40 : 43,730.76 = 18,597.20 : x
  2. Step 2: Convert to fraction form
    31,690.40/43,730.76 = 18,597.20/x
  3. Step 3: Cross multiply
    31,690.40x = 43,730.76 × 18,597.20
  4. Step 4: Simplify right side
    31,690.40x = 813,269,689.87
  5. Step 5: Solve for x
    x = 813,269,689.87/31,690.40
  6. Step 6: Final answer
    x = 25,662.97

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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.