Home / 11,478.06-15,810.22-8,115.10

Finding the Fourth Proportional to 11,478.06, 15,810.22 and 8,115.10

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Solution

The fourth proportional to 11,478.06, 15,810.22 and 8,115.10 is: 11,177.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,478.06 : 15,810.22 = 8,115.10 : x
  2. Step 2: Convert to fraction form
    11,478.06/15,810.22 = 8,115.10/x
  3. Step 3: Cross multiply
    11,478.06x = 15,810.22 × 8,115.10
  4. Step 4: Simplify right side
    11,478.06x = 128,301,516.32
  5. Step 5: Solve for x
    x = 128,301,516.32/11,478.06
  6. Step 6: Final answer
    x = 11,177.98

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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.