Home / 11,609.15-15,959.00-9,988.16

Finding the Fourth Proportional to 11,609.15, 15,959.00 and 9,988.16

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Solution

The fourth proportional to 11,609.15, 15,959.00 and 9,988.16 is: 13,730.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,609.15 : 15,959.00 = 9,988.16 : x
  2. Step 2: Convert to fraction form
    11,609.15/15,959.00 = 9,988.16/x
  3. Step 3: Cross multiply
    11,609.15x = 15,959.00 × 9,988.16
  4. Step 4: Simplify right side
    11,609.15x = 159,400,990.62
  5. Step 5: Solve for x
    x = 159,400,990.62/11,609.15
  6. Step 6: Final answer
    x = 13,730.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.