Home / 10,479.20-15,718.80-3,903.60

Finding the Fourth Proportional to 10,479.20, 15,718.80 and 3,903.60

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Solution

The fourth proportional to 10,479.20, 15,718.80 and 3,903.60 is: 5,855.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,479.20 : 15,718.80 = 3,903.60 : x
  2. Step 2: Convert to fraction form
    10,479.20/15,718.80 = 3,903.60/x
  3. Step 3: Cross multiply
    10,479.20x = 15,718.80 × 3,903.60
  4. Step 4: Simplify right side
    10,479.20x = 61,359,907.68
  5. Step 5: Solve for x
    x = 61,359,907.68/10,479.20
  6. Step 6: Final answer
    x = 5,855.40

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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.