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Finding the Fourth Proportional to 26,585.40, 39,878.10 and 8,117.40

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Solution

The fourth proportional to 26,585.40, 39,878.10 and 8,117.40 is: 12,176.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,585.40 : 39,878.10 = 8,117.40 : x
  2. Step 2: Convert to fraction form
    26,585.40/39,878.10 = 8,117.40/x
  3. Step 3: Cross multiply
    26,585.40x = 39,878.10 × 8,117.40
  4. Step 4: Simplify right side
    26,585.40x = 323,706,488.94
  5. Step 5: Solve for x
    x = 323,706,488.94/26,585.40
  6. Step 6: Final answer
    x = 12,176.10

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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.