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Finding the Fourth Proportional to 28,108.80, 38,802.78 and 17,904.24

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Solution

The fourth proportional to 28,108.80, 38,802.78 and 17,904.24 is: 24,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.80 : 38,802.78 = 17,904.24 : x
  2. Step 2: Convert to fraction form
    28,108.80/38,802.78 = 17,904.24/x
  3. Step 3: Cross multiply
    28,108.80x = 38,802.78 × 17,904.24
  4. Step 4: Simplify right side
    28,108.80x = 694,734,285.79
  5. Step 5: Solve for x
    x = 694,734,285.79/28,108.80
  6. Step 6: Final answer
    x = 24,715.90

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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.