Home / 20,510.60-28,321.44-12,969.14

Finding the Fourth Proportional to 20,510.60, 28,321.44 and 12,969.14

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Solution

The fourth proportional to 20,510.60, 28,321.44 and 12,969.14 is: 17,908.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.60 : 28,321.44 = 12,969.14 : x
  2. Step 2: Convert to fraction form
    20,510.60/28,321.44 = 12,969.14/x
  3. Step 3: Cross multiply
    20,510.60x = 28,321.44 × 12,969.14
  4. Step 4: Simplify right side
    20,510.60x = 367,304,720.36
  5. Step 5: Solve for x
    x = 367,304,720.36/20,510.60
  6. Step 6: Final answer
    x = 17,908.04

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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.