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Finding the Fourth Proportional to 26,561.36, 39,839.88 and 9,920.72

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Solution

The fourth proportional to 26,561.36, 39,839.88 and 9,920.72 is: 14,880.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,561.36 : 39,839.88 = 9,920.72 : x
  2. Step 2: Convert to fraction form
    26,561.36/39,839.88 = 9,920.72/x
  3. Step 3: Cross multiply
    26,561.36x = 39,839.88 × 9,920.72
  4. Step 4: Simplify right side
    26,561.36x = 395,240,294.31
  5. Step 5: Solve for x
    x = 395,240,294.31/26,561.36
  6. Step 6: Final answer
    x = 14,880.27

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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.