Home / 20,718.76-31,065.18-9,618.52

Finding the Fourth Proportional to 20,718.76, 31,065.18 and 9,618.52

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Solution

The fourth proportional to 20,718.76, 31,065.18 and 9,618.52 is: 14,421.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.76 : 31,065.18 = 9,618.52 : x
  2. Step 2: Convert to fraction form
    20,718.76/31,065.18 = 9,618.52/x
  3. Step 3: Cross multiply
    20,718.76x = 31,065.18 × 9,618.52
  4. Step 4: Simplify right side
    20,718.76x = 298,801,055.13
  5. Step 5: Solve for x
    x = 298,801,055.13/20,718.76
  6. Step 6: Final answer
    x = 14,421.76

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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.