Home / 10,639.80-15,959.70-9,718.20

Finding the Fourth Proportional to 10,639.80, 15,959.70 and 9,718.20

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Solution

The fourth proportional to 10,639.80, 15,959.70 and 9,718.20 is: 14,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.80 : 15,959.70 = 9,718.20 : x
  2. Step 2: Convert to fraction form
    10,639.80/15,959.70 = 9,718.20/x
  3. Step 3: Cross multiply
    10,639.80x = 15,959.70 × 9,718.20
  4. Step 4: Simplify right side
    10,639.80x = 155,099,556.54
  5. Step 5: Solve for x
    x = 155,099,556.54/10,639.80
  6. Step 6: Final answer
    x = 14,577.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.