Home / 12,384.20-18,541.20-9,615.80

Finding the Fourth Proportional to 12,384.20, 18,541.20 and 9,615.80

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Solution

The fourth proportional to 12,384.20, 18,541.20 and 9,615.80 is: 14,396.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,384.20 : 18,541.20 = 9,615.80 : x
  2. Step 2: Convert to fraction form
    12,384.20/18,541.20 = 9,615.80/x
  3. Step 3: Cross multiply
    12,384.20x = 18,541.20 × 9,615.80
  4. Step 4: Simplify right side
    12,384.20x = 178,288,470.96
  5. Step 5: Solve for x
    x = 178,288,470.96/12,384.20
  6. Step 6: Final answer
    x = 14,396.45

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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.