Home / 20,979.81-31,471.45-9,133.97

Finding the Fourth Proportional to 20,979.81, 31,471.45 and 9,133.97

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Solution

The fourth proportional to 20,979.81, 31,471.45 and 9,133.97 is: 13,701.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.81 : 31,471.45 = 9,133.97 : x
  2. Step 2: Convert to fraction form
    20,979.81/31,471.45 = 9,133.97/x
  3. Step 3: Cross multiply
    20,979.81x = 31,471.45 × 9,133.97
  4. Step 4: Simplify right side
    20,979.81x = 287,459,099.96
  5. Step 5: Solve for x
    x = 287,459,099.96/20,979.81
  6. Step 6: Final answer
    x = 13,701.70

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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.