Home / 10,205.20-15,307.80-3,280.40

Finding the Fourth Proportional to 10,205.20, 15,307.80 and 3,280.40

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Solution

The fourth proportional to 10,205.20, 15,307.80 and 3,280.40 is: 4,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,205.20 : 15,307.80 = 3,280.40 : x
  2. Step 2: Convert to fraction form
    10,205.20/15,307.80 = 3,280.40/x
  3. Step 3: Cross multiply
    10,205.20x = 15,307.80 × 3,280.40
  4. Step 4: Simplify right side
    10,205.20x = 50,215,707.12
  5. Step 5: Solve for x
    x = 50,215,707.12/10,205.20
  6. Step 6: Final answer
    x = 4,920.60

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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.