Home / 11,115.15-15,340.23-6,400.35

Finding the Fourth Proportional to 11,115.15, 15,340.23 and 6,400.35

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Solution

The fourth proportional to 11,115.15, 15,340.23 and 6,400.35 is: 8,833.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.15 : 15,340.23 = 6,400.35 : x
  2. Step 2: Convert to fraction form
    11,115.15/15,340.23 = 6,400.35/x
  3. Step 3: Cross multiply
    11,115.15x = 15,340.23 × 6,400.35
  4. Step 4: Simplify right side
    11,115.15x = 98,182,841.08
  5. Step 5: Solve for x
    x = 98,182,841.08/11,115.15
  6. Step 6: Final answer
    x = 8,833.24

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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.