Home / 10,912.76-15,050.38-9,219.60

Finding the Fourth Proportional to 10,912.76, 15,050.38 and 9,219.60

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Solution

The fourth proportional to 10,912.76, 15,050.38 and 9,219.60 is: 12,715.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.76 : 15,050.38 = 9,219.60 : x
  2. Step 2: Convert to fraction form
    10,912.76/15,050.38 = 9,219.60/x
  3. Step 3: Cross multiply
    10,912.76x = 15,050.38 × 9,219.60
  4. Step 4: Simplify right side
    10,912.76x = 138,758,483.45
  5. Step 5: Solve for x
    x = 138,758,483.45/10,912.76
  6. Step 6: Final answer
    x = 12,715.25

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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.