Home / 20,730.30-31,071.15-15,530.10

Finding the Fourth Proportional to 20,730.30, 31,071.15 and 15,530.10

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Solution

The fourth proportional to 20,730.30, 31,071.15 and 15,530.10 is: 23,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.30 : 31,071.15 = 15,530.10 : x
  2. Step 2: Convert to fraction form
    20,730.30/31,071.15 = 15,530.10/x
  3. Step 3: Cross multiply
    20,730.30x = 31,071.15 × 15,530.10
  4. Step 4: Simplify right side
    20,730.30x = 482,538,066.62
  5. Step 5: Solve for x
    x = 482,538,066.62/20,730.30
  6. Step 6: Final answer
    x = 23,276.95

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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.