Home / 12,121.40-18,191.21-5,552.19

Finding the Fourth Proportional to 12,121.40, 18,191.21 and 5,552.19

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Solution

The fourth proportional to 12,121.40, 18,191.21 and 5,552.19 is: 8,332.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.40 : 18,191.21 = 5,552.19 : x
  2. Step 2: Convert to fraction form
    12,121.40/18,191.21 = 5,552.19/x
  3. Step 3: Cross multiply
    12,121.40x = 18,191.21 × 5,552.19
  4. Step 4: Simplify right side
    12,121.40x = 101,001,026.49
  5. Step 5: Solve for x
    x = 101,001,026.49/12,121.40
  6. Step 6: Final answer
    x = 8,332.45

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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.