Home / 10,911.28-15,061.20-7,776.60

Finding the Fourth Proportional to 10,911.28, 15,061.20 and 7,776.60

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Solution

The fourth proportional to 10,911.28, 15,061.20 and 7,776.60 is: 10,734.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,911.28 : 15,061.20 = 7,776.60 : x
  2. Step 2: Convert to fraction form
    10,911.28/15,061.20 = 7,776.60/x
  3. Step 3: Cross multiply
    10,911.28x = 15,061.20 × 7,776.60
  4. Step 4: Simplify right side
    10,911.28x = 117,124,927.92
  5. Step 5: Solve for x
    x = 117,124,927.92/10,911.28
  6. Step 6: Final answer
    x = 10,734.30

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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.