Home / 11,101.28-15,312.12-7,914.20

Finding the Fourth Proportional to 11,101.28, 15,312.12 and 7,914.20

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Solution

The fourth proportional to 11,101.28, 15,312.12 and 7,914.20 is: 10,916.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,101.28 : 15,312.12 = 7,914.20 : x
  2. Step 2: Convert to fraction form
    11,101.28/15,312.12 = 7,914.20/x
  3. Step 3: Cross multiply
    11,101.28x = 15,312.12 × 7,914.20
  4. Step 4: Simplify right side
    11,101.28x = 121,183,180.10
  5. Step 5: Solve for x
    x = 121,183,180.10/11,101.28
  6. Step 6: Final answer
    x = 10,916.14

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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.