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Finding the Fourth Proportional to 28,588.88, 42,904.20 and 28,371.68

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Solution

The fourth proportional to 28,588.88, 42,904.20 and 28,371.68 is: 42,578.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,588.88 : 42,904.20 = 28,371.68 : x
  2. Step 2: Convert to fraction form
    28,588.88/42,904.20 = 28,371.68/x
  3. Step 3: Cross multiply
    28,588.88x = 42,904.20 × 28,371.68
  4. Step 4: Simplify right side
    28,588.88x = 1,217,264,233.06
  5. Step 5: Solve for x
    x = 1,217,264,233.06/28,588.88
  6. Step 6: Final answer
    x = 42,578.24

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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.