Home / 31,812.10-43,915.64-18,380.76

Finding the Fourth Proportional to 31,812.10, 43,915.64 and 18,380.76

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Solution

The fourth proportional to 31,812.10, 43,915.64 and 18,380.76 is: 25,374.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,812.10 : 43,915.64 = 18,380.76 : x
  2. Step 2: Convert to fraction form
    31,812.10/43,915.64 = 18,380.76/x
  3. Step 3: Cross multiply
    31,812.10x = 43,915.64 × 18,380.76
  4. Step 4: Simplify right side
    31,812.10x = 807,202,839.09
  5. Step 5: Solve for x
    x = 807,202,839.09/31,812.10
  6. Step 6: Final answer
    x = 25,374.08

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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.