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Finding the Fourth Proportional to 26,280.40, 39,431.40 and 9,648.40

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Solution

The fourth proportional to 26,280.40, 39,431.40 and 9,648.40 is: 14,476.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,280.40 : 39,431.40 = 9,648.40 : x
  2. Step 2: Convert to fraction form
    26,280.40/39,431.40 = 9,648.40/x
  3. Step 3: Cross multiply
    26,280.40x = 39,431.40 × 9,648.40
  4. Step 4: Simplify right side
    26,280.40x = 380,449,919.76
  5. Step 5: Solve for x
    x = 380,449,919.76/26,280.40
  6. Step 6: Final answer
    x = 14,476.57

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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.