Home / 31,719.72-47,547.18-20,648.64

Finding the Fourth Proportional to 31,719.72, 47,547.18 and 20,648.64

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Solution

The fourth proportional to 31,719.72, 47,547.18 and 20,648.64 is: 30,951.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,719.72 : 47,547.18 = 20,648.64 : x
  2. Step 2: Convert to fraction form
    31,719.72/47,547.18 = 20,648.64/x
  3. Step 3: Cross multiply
    31,719.72x = 47,547.18 × 20,648.64
  4. Step 4: Simplify right side
    31,719.72x = 981,784,602.84
  5. Step 5: Solve for x
    x = 981,784,602.84/31,719.72
  6. Step 6: Final answer
    x = 30,951.87

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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.