Home / 13,605.16-20,381.40-7,969.20

Finding the Fourth Proportional to 13,605.16, 20,381.40 and 7,969.20

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Solution

The fourth proportional to 13,605.16, 20,381.40 and 7,969.20 is: 11,938.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.16 : 20,381.40 = 7,969.20 : x
  2. Step 2: Convert to fraction form
    13,605.16/20,381.40 = 7,969.20/x
  3. Step 3: Cross multiply
    13,605.16x = 20,381.40 × 7,969.20
  4. Step 4: Simplify right side
    13,605.16x = 162,423,452.88
  5. Step 5: Solve for x
    x = 162,423,452.88/13,605.16
  6. Step 6: Final answer
    x = 11,938.37

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1.5x scale

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.