Home / 11,155.27-15,394.11-6,439.45

Finding the Fourth Proportional to 11,155.27, 15,394.11 and 6,439.45

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Solution

The fourth proportional to 11,155.27, 15,394.11 and 6,439.45 is: 8,886.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155.27 : 15,394.11 = 6,439.45 : x
  2. Step 2: Convert to fraction form
    11,155.27/15,394.11 = 6,439.45/x
  3. Step 3: Cross multiply
    11,155.27x = 15,394.11 × 6,439.45
  4. Step 4: Simplify right side
    11,155.27x = 99,129,601.64
  5. Step 5: Solve for x
    x = 99,129,601.64/11,155.27
  6. Step 6: Final answer
    x = 8,886.35

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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.