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Finding the Fourth Proportional to 28,008.94, 42,020.70 and 10,480.15

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Solution

The fourth proportional to 28,008.94, 42,020.70 and 10,480.15 is: 15,722.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.94 : 42,020.70 = 10,480.15 : x
  2. Step 2: Convert to fraction form
    28,008.94/42,020.70 = 10,480.15/x
  3. Step 3: Cross multiply
    28,008.94x = 42,020.70 × 10,480.15
  4. Step 4: Simplify right side
    28,008.94x = 440,383,239.11
  5. Step 5: Solve for x
    x = 440,383,239.11/28,008.94
  6. Step 6: Final answer
    x = 15,722.95

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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.