Home / 20,731.74-31,243.59-18,760.02

Finding the Fourth Proportional to 20,731.74, 31,243.59 and 18,760.02

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Solution

The fourth proportional to 20,731.74, 31,243.59 and 18,760.02 is: 28,272.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.74 : 31,243.59 = 18,760.02 : x
  2. Step 2: Convert to fraction form
    20,731.74/31,243.59 = 18,760.02/x
  3. Step 3: Cross multiply
    20,731.74x = 31,243.59 × 18,760.02
  4. Step 4: Simplify right side
    20,731.74x = 586,130,373.27
  5. Step 5: Solve for x
    x = 586,130,373.27/20,731.74
  6. Step 6: Final answer
    x = 28,272.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.