Home / 20,903.28-31,351.68-6,108.72

Finding the Fourth Proportional to 20,903.28, 31,351.68 and 6,108.72

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Solution

The fourth proportional to 20,903.28, 31,351.68 and 6,108.72 is: 9,162.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.28 : 31,351.68 = 6,108.72 : x
  2. Step 2: Convert to fraction form
    20,903.28/31,351.68 = 6,108.72/x
  3. Step 3: Cross multiply
    20,903.28x = 31,351.68 × 6,108.72
  4. Step 4: Simplify right side
    20,903.28x = 191,518,634.65
  5. Step 5: Solve for x
    x = 191,518,634.65/20,903.28
  6. Step 6: Final answer
    x = 9,162.13

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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.