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Finding the Fourth Proportional to 28,111.68, 42,115.68 and 14,244.48

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Solution

The fourth proportional to 28,111.68, 42,115.68 and 14,244.48 is: 21,340.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.68 : 42,115.68 = 14,244.48 : x
  2. Step 2: Convert to fraction form
    28,111.68/42,115.68 = 14,244.48/x
  3. Step 3: Cross multiply
    28,111.68x = 42,115.68 × 14,244.48
  4. Step 4: Simplify right side
    28,111.68x = 599,915,961.45
  5. Step 5: Solve for x
    x = 599,915,961.45/28,111.68
  6. Step 6: Final answer
    x = 21,340.45

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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.