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Finding the Fourth Proportional to 10,878.66, 15,019.77 and 8,356.26

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Solution

The fourth proportional to 10,878.66, 15,019.77 and 8,356.26 is: 11,537.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,878.66 : 15,019.77 = 8,356.26 : x
  2. Step 2: Convert to fraction form
    10,878.66/15,019.77 = 8,356.26/x
  3. Step 3: Cross multiply
    10,878.66x = 15,019.77 × 8,356.26
  4. Step 4: Simplify right side
    10,878.66x = 125,509,103.26
  5. Step 5: Solve for x
    x = 125,509,103.26/10,878.66
  6. Step 6: Final answer
    x = 11,537.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.