Home / 21,200.80-29,266.32-13,751.20

Finding the Fourth Proportional to 21,200.80, 29,266.32 and 13,751.20

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Solution

The fourth proportional to 21,200.80, 29,266.32 and 13,751.20 is: 18,982.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,200.80 : 29,266.32 = 13,751.20 : x
  2. Step 2: Convert to fraction form
    21,200.80/29,266.32 = 13,751.20/x
  3. Step 3: Cross multiply
    21,200.80x = 29,266.32 × 13,751.20
  4. Step 4: Simplify right side
    21,200.80x = 402,447,019.58
  5. Step 5: Solve for x
    x = 402,447,019.58/21,200.80
  6. Step 6: Final answer
    x = 18,982.63

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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.