Home / 10,917.89-15,057.86-7,331.76

Finding the Fourth Proportional to 10,917.89, 15,057.86 and 7,331.76

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Solution

The fourth proportional to 10,917.89, 15,057.86 and 7,331.76 is: 10,111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.89 : 15,057.86 = 7,331.76 : x
  2. Step 2: Convert to fraction form
    10,917.89/15,057.86 = 7,331.76/x
  3. Step 3: Cross multiply
    10,917.89x = 15,057.86 × 7,331.76
  4. Step 4: Simplify right side
    10,917.89x = 110,400,578.97
  5. Step 5: Solve for x
    x = 110,400,578.97/10,917.89
  6. Step 6: Final answer
    x = 10,111.90

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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.