Home / 9,971.78-13,750.89-6,986.66

Finding the Fourth Proportional to 9,971.78, 13,750.89 and 6,986.66

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Solution

The fourth proportional to 9,971.78, 13,750.89 and 6,986.66 is: 9,634.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,971.78 : 13,750.89 = 6,986.66 : x
  2. Step 2: Convert to fraction form
    9,971.78/13,750.89 = 6,986.66/x
  3. Step 3: Cross multiply
    9,971.78x = 13,750.89 × 6,986.66
  4. Step 4: Simplify right side
    9,971.78x = 96,072,793.13
  5. Step 5: Solve for x
    x = 96,072,793.13/9,971.78
  6. Step 6: Final answer
    x = 9,634.47

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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.