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Finding the Fourth Proportional to 28,494.78, 39,322.02 and 15,919.53

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Solution

The fourth proportional to 28,494.78, 39,322.02 and 15,919.53 is: 21,968.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,494.78 : 39,322.02 = 15,919.53 : x
  2. Step 2: Convert to fraction form
    28,494.78/39,322.02 = 15,919.53/x
  3. Step 3: Cross multiply
    28,494.78x = 39,322.02 × 15,919.53
  4. Step 4: Simplify right side
    28,494.78x = 625,988,077.05
  5. Step 5: Solve for x
    x = 625,988,077.05/28,494.78
  6. Step 6: Final answer
    x = 21,968.52

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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.