Home / 10,955.47-15,113.28-7,177

Finding the Fourth Proportional to 10,955.47, 15,113.28 and 7,177

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Solution

The fourth proportional to 10,955.47, 15,113.28 and 7,177 is: 9,900.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.47 : 15,113.28 = 7,177 : x
  2. Step 2: Convert to fraction form
    10,955.47/15,113.28 = 7,177/x
  3. Step 3: Cross multiply
    10,955.47x = 15,113.28 × 7,177
  4. Step 4: Simplify right side
    10,955.47x = 108,468,010.56
  5. Step 5: Solve for x
    x = 108,468,010.56/10,955.47
  6. Step 6: Final answer
    x = 9,900.81

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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.