Home / 40,839.12-61,127.40-21,090.72

Finding the Fourth Proportional to 40,839.12, 61,127.40 and 21,090.72

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Solution

The fourth proportional to 40,839.12, 61,127.40 and 21,090.72 is: 31,568.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,839.12 : 61,127.40 = 21,090.72 : x
  2. Step 2: Convert to fraction form
    40,839.12/61,127.40 = 21,090.72/x
  3. Step 3: Cross multiply
    40,839.12x = 61,127.40 × 21,090.72
  4. Step 4: Simplify right side
    40,839.12x = 1,289,220,877.73
  5. Step 5: Solve for x
    x = 1,289,220,877.73/40,839.12
  6. Step 6: Final answer
    x = 31,568.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.