Home / 13,409.28-18,487.78-11,140.20

Finding the Fourth Proportional to 13,409.28, 18,487.78 and 11,140.20

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Solution

The fourth proportional to 13,409.28, 18,487.78 and 11,140.20 is: 15,359.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,409.28 : 18,487.78 = 11,140.20 : x
  2. Step 2: Convert to fraction form
    13,409.28/18,487.78 = 11,140.20/x
  3. Step 3: Cross multiply
    13,409.28x = 18,487.78 × 11,140.20
  4. Step 4: Simplify right side
    13,409.28x = 205,957,566.76
  5. Step 5: Solve for x
    x = 205,957,566.76/13,409.28
  6. Step 6: Final answer
    x = 15,359.33

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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.