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Finding the Fourth Proportional to 26,985.40, 40,478.10 and 8,517.40

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Solution

The fourth proportional to 26,985.40, 40,478.10 and 8,517.40 is: 12,776.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,985.40 : 40,478.10 = 8,517.40 : x
  2. Step 2: Convert to fraction form
    26,985.40/40,478.10 = 8,517.40/x
  3. Step 3: Cross multiply
    26,985.40x = 40,478.10 × 8,517.40
  4. Step 4: Simplify right side
    26,985.40x = 344,768,168.94
  5. Step 5: Solve for x
    x = 344,768,168.94/26,985.40
  6. Step 6: Final answer
    x = 12,776.10

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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.