Home / 13,972.80-21,002.40-13,713.60

Finding the Fourth Proportional to 13,972.80, 21,002.40 and 13,713.60

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Solution

The fourth proportional to 13,972.80, 21,002.40 and 13,713.60 is: 20,612.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,972.80 : 21,002.40 = 13,713.60 : x
  2. Step 2: Convert to fraction form
    13,972.80/21,002.40 = 13,713.60/x
  3. Step 3: Cross multiply
    13,972.80x = 21,002.40 × 13,713.60
  4. Step 4: Simplify right side
    13,972.80x = 288,018,512.64
  5. Step 5: Solve for x
    x = 288,018,512.64/13,972.80
  6. Step 6: Final answer
    x = 20,612.80

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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.