Home / 10,954.79-15,120.71-6,480.10

Finding the Fourth Proportional to 10,954.79, 15,120.71 and 6,480.10

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Solution

The fourth proportional to 10,954.79, 15,120.71 and 6,480.10 is: 8,944.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,954.79 : 15,120.71 = 6,480.10 : x
  2. Step 2: Convert to fraction form
    10,954.79/15,120.71 = 6,480.10/x
  3. Step 3: Cross multiply
    10,954.79x = 15,120.71 × 6,480.10
  4. Step 4: Simplify right side
    10,954.79x = 97,983,650.77
  5. Step 5: Solve for x
    x = 97,983,650.77/10,954.79
  6. Step 6: Final answer
    x = 8,944.37

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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.