Home / 11,163.60-15,409.80-9,176.40

Finding the Fourth Proportional to 11,163.60, 15,409.80 and 9,176.40

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Solution

The fourth proportional to 11,163.60, 15,409.80 and 9,176.40 is: 12,666.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.60 : 15,409.80 = 9,176.40 : x
  2. Step 2: Convert to fraction form
    11,163.60/15,409.80 = 9,176.40/x
  3. Step 3: Cross multiply
    11,163.60x = 15,409.80 × 9,176.40
  4. Step 4: Simplify right side
    11,163.60x = 141,406,488.72
  5. Step 5: Solve for x
    x = 141,406,488.72/11,163.60
  6. Step 6: Final answer
    x = 12,666.75

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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.