Home / 11,921.45-16,451.28-6,543.89

Finding the Fourth Proportional to 11,921.45, 16,451.28 and 6,543.89

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Solution

The fourth proportional to 11,921.45, 16,451.28 and 6,543.89 is: 9,030.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.45 : 16,451.28 = 6,543.89 : x
  2. Step 2: Convert to fraction form
    11,921.45/16,451.28 = 6,543.89/x
  3. Step 3: Cross multiply
    11,921.45x = 16,451.28 × 6,543.89
  4. Step 4: Simplify right side
    11,921.45x = 107,655,366.68
  5. Step 5: Solve for x
    x = 107,655,366.68/11,921.45
  6. Step 6: Final answer
    x = 9,030.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.