Home / 31,121.96-42,948.25-16,974.81

Finding the Fourth Proportional to 31,121.96, 42,948.25 and 16,974.81

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Solution

The fourth proportional to 31,121.96, 42,948.25 and 16,974.81 is: 23,425.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.96 : 42,948.25 = 16,974.81 : x
  2. Step 2: Convert to fraction form
    31,121.96/42,948.25 = 16,974.81/x
  3. Step 3: Cross multiply
    31,121.96x = 42,948.25 × 16,974.81
  4. Step 4: Simplify right side
    31,121.96x = 729,038,341.15
  5. Step 5: Solve for x
    x = 729,038,341.15/31,121.96
  6. Step 6: Final answer
    x = 23,425.20

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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.