Home / 10,954.89-15,117.98-6,479.78

Finding the Fourth Proportional to 10,954.89, 15,117.98 and 6,479.78

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Solution

The fourth proportional to 10,954.89, 15,117.98 and 6,479.78 is: 8,942.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,954.89 : 15,117.98 = 6,479.78 : x
  2. Step 2: Convert to fraction form
    10,954.89/15,117.98 = 6,479.78/x
  3. Step 3: Cross multiply
    10,954.89x = 15,117.98 × 6,479.78
  4. Step 4: Simplify right side
    10,954.89x = 97,961,076.46
  5. Step 5: Solve for x
    x = 97,961,076.46/10,954.89
  6. Step 6: Final answer
    x = 8,942.22

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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.