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Finding the Fourth Proportional to 12,307.20, 18,439.20 and 10,579.20

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Solution

The fourth proportional to 12,307.20, 18,439.20 and 10,579.20 is: 15,850.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,307.20 : 18,439.20 = 10,579.20 : x
  2. Step 2: Convert to fraction form
    12,307.20/18,439.20 = 10,579.20/x
  3. Step 3: Cross multiply
    12,307.20x = 18,439.20 × 10,579.20
  4. Step 4: Simplify right side
    12,307.20x = 195,071,984.64
  5. Step 5: Solve for x
    x = 195,071,984.64/12,307.20
  6. Step 6: Final answer
    x = 15,850.23

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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.