Home / 20,839.64-28,759.02-11,409.08

Finding the Fourth Proportional to 20,839.64, 28,759.02 and 11,409.08

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Solution

The fourth proportional to 20,839.64, 28,759.02 and 11,409.08 is: 15,744.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.64 : 28,759.02 = 11,409.08 : x
  2. Step 2: Convert to fraction form
    20,839.64/28,759.02 = 11,409.08/x
  3. Step 3: Cross multiply
    20,839.64x = 28,759.02 × 11,409.08
  4. Step 4: Simplify right side
    20,839.64x = 328,113,959.90
  5. Step 5: Solve for x
    x = 328,113,959.90/20,839.64
  6. Step 6: Final answer
    x = 15,744.70

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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.