Home / 28,938.80-43,422.60-11,409.20

Finding the Fourth Proportional to 28,938.80, 43,422.60 and 11,409.20

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Solution

The fourth proportional to 28,938.80, 43,422.60 and 11,409.20 is: 17,119.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,938.80 : 43,422.60 = 11,409.20 : x
  2. Step 2: Convert to fraction form
    28,938.80/43,422.60 = 11,409.20/x
  3. Step 3: Cross multiply
    28,938.80x = 43,422.60 × 11,409.20
  4. Step 4: Simplify right side
    28,938.80x = 495,417,127.92
  5. Step 5: Solve for x
    x = 495,417,127.92/28,938.80
  6. Step 6: Final answer
    x = 17,119.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.