Home / 31,399.50-43,312.08-18,644.02

Finding the Fourth Proportional to 31,399.50, 43,312.08 and 18,644.02

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Solution

The fourth proportional to 31,399.50, 43,312.08 and 18,644.02 is: 25,717.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,399.50 : 43,312.08 = 18,644.02 : x
  2. Step 2: Convert to fraction form
    31,399.50/43,312.08 = 18,644.02/x
  3. Step 3: Cross multiply
    31,399.50x = 43,312.08 × 18,644.02
  4. Step 4: Simplify right side
    31,399.50x = 807,511,285.76
  5. Step 5: Solve for x
    x = 807,511,285.76/31,399.50
  6. Step 6: Final answer
    x = 25,717.33

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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.