Home / 11,487.20-15,854.40-6,771.20

Finding the Fourth Proportional to 11,487.20, 15,854.40 and 6,771.20

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Solution

The fourth proportional to 11,487.20, 15,854.40 and 6,771.20 is: 9,345.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,487.20 : 15,854.40 = 6,771.20 : x
  2. Step 2: Convert to fraction form
    11,487.20/15,854.40 = 6,771.20/x
  3. Step 3: Cross multiply
    11,487.20x = 15,854.40 × 6,771.20
  4. Step 4: Simplify right side
    11,487.20x = 107,353,313.28
  5. Step 5: Solve for x
    x = 107,353,313.28/11,487.20
  6. Step 6: Final answer
    x = 9,345.47

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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.