Home / 12,225.11-18,312.13-7,820.19

Finding the Fourth Proportional to 12,225.11, 18,312.13 and 7,820.19

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Solution

The fourth proportional to 12,225.11, 18,312.13 and 7,820.19 is: 11,713.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,225.11 : 18,312.13 = 7,820.19 : x
  2. Step 2: Convert to fraction form
    12,225.11/18,312.13 = 7,820.19/x
  3. Step 3: Cross multiply
    12,225.11x = 18,312.13 × 7,820.19
  4. Step 4: Simplify right side
    12,225.11x = 143,204,335.90
  5. Step 5: Solve for x
    x = 143,204,335.90/12,225.11
  6. Step 6: Final answer
    x = 11,713.95

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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.