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Finding the Fourth Proportional to 26,685.20, 40,027.80 and 18,390.80

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Solution

The fourth proportional to 26,685.20, 40,027.80 and 18,390.80 is: 27,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,685.20 : 40,027.80 = 18,390.80 : x
  2. Step 2: Convert to fraction form
    26,685.20/40,027.80 = 18,390.80/x
  3. Step 3: Cross multiply
    26,685.20x = 40,027.80 × 18,390.80
  4. Step 4: Simplify right side
    26,685.20x = 736,143,264.24
  5. Step 5: Solve for x
    x = 736,143,264.24/26,685.20
  6. Step 6: Final answer
    x = 27,586.20

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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.