Home / 10,867.80-15,001.08-6,391.44

Finding the Fourth Proportional to 10,867.80, 15,001.08 and 6,391.44

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Solution

The fourth proportional to 10,867.80, 15,001.08 and 6,391.44 is: 8,822.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,867.80 : 15,001.08 = 6,391.44 : x
  2. Step 2: Convert to fraction form
    10,867.80/15,001.08 = 6,391.44/x
  3. Step 3: Cross multiply
    10,867.80x = 15,001.08 × 6,391.44
  4. Step 4: Simplify right side
    10,867.80x = 95,878,502.76
  5. Step 5: Solve for x
    x = 95,878,502.76/10,867.80
  6. Step 6: Final answer
    x = 8,822.25

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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.