Home / 11,100.60-15,319.80-6,386.40

Finding the Fourth Proportional to 11,100.60, 15,319.80 and 6,386.40

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Solution

The fourth proportional to 11,100.60, 15,319.80 and 6,386.40 is: 8,813.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,100.60 : 15,319.80 = 6,386.40 : x
  2. Step 2: Convert to fraction form
    11,100.60/15,319.80 = 6,386.40/x
  3. Step 3: Cross multiply
    11,100.60x = 15,319.80 × 6,386.40
  4. Step 4: Simplify right side
    11,100.60x = 97,838,370.72
  5. Step 5: Solve for x
    x = 97,838,370.72/11,100.60
  6. Step 6: Final answer
    x = 8,813.79

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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.