Home / 10,307.20-15,439.20-8,579.20

Finding the Fourth Proportional to 10,307.20, 15,439.20 and 8,579.20

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Solution

The fourth proportional to 10,307.20, 15,439.20 and 8,579.20 is: 12,850.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,307.20 : 15,439.20 = 8,579.20 : x
  2. Step 2: Convert to fraction form
    10,307.20/15,439.20 = 8,579.20/x
  3. Step 3: Cross multiply
    10,307.20x = 15,439.20 × 8,579.20
  4. Step 4: Simplify right side
    10,307.20x = 132,455,984.64
  5. Step 5: Solve for x
    x = 132,455,984.64/10,307.20
  6. Step 6: Final answer
    x = 12,850.82

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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.