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Finding the Fourth Proportional to 26,666.96, 39,987 and 8,891.32

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Solution

The fourth proportional to 26,666.96, 39,987 and 8,891.32 is: 13,332.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,666.96 : 39,987 = 8,891.32 : x
  2. Step 2: Convert to fraction form
    26,666.96/39,987 = 8,891.32/x
  3. Step 3: Cross multiply
    26,666.96x = 39,987 × 8,891.32
  4. Step 4: Simplify right side
    26,666.96x = 355,537,212.84
  5. Step 5: Solve for x
    x = 355,537,212.84/26,666.96
  6. Step 6: Final answer
    x = 13,332.50

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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.