Home / 11,105.48-15,326.02-6,389.76

Finding the Fourth Proportional to 11,105.48, 15,326.02 and 6,389.76

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Solution

The fourth proportional to 11,105.48, 15,326.02 and 6,389.76 is: 8,818.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,105.48 : 15,326.02 = 6,389.76 : x
  2. Step 2: Convert to fraction form
    11,105.48/15,326.02 = 6,389.76/x
  3. Step 3: Cross multiply
    11,105.48x = 15,326.02 × 6,389.76
  4. Step 4: Simplify right side
    11,105.48x = 97,929,589.56
  5. Step 5: Solve for x
    x = 97,929,589.56/11,105.48
  6. Step 6: Final answer
    x = 8,818.13

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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.