Home / 20,685.67-31,036.02-10,154.58

Finding the Fourth Proportional to 20,685.67, 31,036.02 and 10,154.58

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Solution

The fourth proportional to 20,685.67, 31,036.02 and 10,154.58 is: 15,235.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.67 : 31,036.02 = 10,154.58 : x
  2. Step 2: Convert to fraction form
    20,685.67/31,036.02 = 10,154.58/x
  3. Step 3: Cross multiply
    20,685.67x = 31,036.02 × 10,154.58
  4. Step 4: Simplify right side
    20,685.67x = 315,157,747.97
  5. Step 5: Solve for x
    x = 315,157,747.97/20,685.67
  6. Step 6: Final answer
    x = 15,235.56

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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.