Home / 12,209.40-18,300-5,621.76

Finding the Fourth Proportional to 12,209.40, 18,300 and 5,621.76

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Solution

The fourth proportional to 12,209.40, 18,300 and 5,621.76 is: 8,426.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,209.40 : 18,300 = 5,621.76 : x
  2. Step 2: Convert to fraction form
    12,209.40/18,300 = 5,621.76/x
  3. Step 3: Cross multiply
    12,209.40x = 18,300 × 5,621.76
  4. Step 4: Simplify right side
    12,209.40x = 102,878,208
  5. Step 5: Solve for x
    x = 102,878,208/12,209.40
  6. Step 6: Final answer
    x = 8,426.15

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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.