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Finding the Fourth Proportional to 28,015.90, 41,980.02 and 17,605.78

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Solution

The fourth proportional to 28,015.90, 41,980.02 and 17,605.78 is: 26,381.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.90 : 41,980.02 = 17,605.78 : x
  2. Step 2: Convert to fraction form
    28,015.90/41,980.02 = 17,605.78/x
  3. Step 3: Cross multiply
    28,015.90x = 41,980.02 × 17,605.78
  4. Step 4: Simplify right side
    28,015.90x = 739,090,996.52
  5. Step 5: Solve for x
    x = 739,090,996.52/28,015.90
  6. Step 6: Final answer
    x = 26,381.13

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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.