Home / 10,979.80-15,191.50-9,586.60

Finding the Fourth Proportional to 10,979.80, 15,191.50 and 9,586.60

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Solution

The fourth proportional to 10,979.80, 15,191.50 and 9,586.60 is: 13,263.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.80 : 15,191.50 = 9,586.60 : x
  2. Step 2: Convert to fraction form
    10,979.80/15,191.50 = 9,586.60/x
  3. Step 3: Cross multiply
    10,979.80x = 15,191.50 × 9,586.60
  4. Step 4: Simplify right side
    10,979.80x = 145,634,833.90
  5. Step 5: Solve for x
    x = 145,634,833.90/10,979.80
  6. Step 6: Final answer
    x = 13,263.89

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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.