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Finding the Fourth Proportional to 27,687.60, 41,485.80 and 15,980.40

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Solution

The fourth proportional to 27,687.60, 41,485.80 and 15,980.40 is: 23,944.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,687.60 : 41,485.80 = 15,980.40 : x
  2. Step 2: Convert to fraction form
    27,687.60/41,485.80 = 15,980.40/x
  3. Step 3: Cross multiply
    27,687.60x = 41,485.80 × 15,980.40
  4. Step 4: Simplify right side
    27,687.60x = 662,959,678.32
  5. Step 5: Solve for x
    x = 662,959,678.32/27,687.60
  6. Step 6: Final answer
    x = 23,944.28

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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.