Home / 10,881.66-15,015.55-6,405.14

Finding the Fourth Proportional to 10,881.66, 15,015.55 and 6,405.14

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Solution

The fourth proportional to 10,881.66, 15,015.55 and 6,405.14 is: 8,838.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.66 : 15,015.55 = 6,405.14 : x
  2. Step 2: Convert to fraction form
    10,881.66/15,015.55 = 6,405.14/x
  3. Step 3: Cross multiply
    10,881.66x = 15,015.55 × 6,405.14
  4. Step 4: Simplify right side
    10,881.66x = 96,176,665.14
  5. Step 5: Solve for x
    x = 96,176,665.14/10,881.66
  6. Step 6: Final answer
    x = 8,838.42

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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.