Home / 28,266.84-39,009.72-15,691.80

Finding the Fourth Proportional to 28,266.84, 39,009.72 and 15,691.80

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Solution

The fourth proportional to 28,266.84, 39,009.72 and 15,691.80 is: 21,655.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,266.84 : 39,009.72 = 15,691.80 : x
  2. Step 2: Convert to fraction form
    28,266.84/39,009.72 = 15,691.80/x
  3. Step 3: Cross multiply
    28,266.84x = 39,009.72 × 15,691.80
  4. Step 4: Simplify right side
    28,266.84x = 612,132,724.30
  5. Step 5: Solve for x
    x = 612,132,724.30/28,266.84
  6. Step 6: Final answer
    x = 21,655.51

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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.