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Finding the Fourth Proportional to 28,480.83, 42,721.94 and 8,759.53

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Solution

The fourth proportional to 28,480.83, 42,721.94 and 8,759.53 is: 13,139.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.83 : 42,721.94 = 8,759.53 : x
  2. Step 2: Convert to fraction form
    28,480.83/42,721.94 = 8,759.53/x
  3. Step 3: Cross multiply
    28,480.83x = 42,721.94 × 8,759.53
  4. Step 4: Simplify right side
    28,480.83x = 374,224,071.29
  5. Step 5: Solve for x
    x = 374,224,071.29/28,480.83
  6. Step 6: Final answer
    x = 13,139.51

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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.