Home / 12,389.10-18,587.70-4,068.78

Finding the Fourth Proportional to 12,389.10, 18,587.70 and 4,068.78

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Solution

The fourth proportional to 12,389.10, 18,587.70 and 4,068.78 is: 6,104.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.10 : 18,587.70 = 4,068.78 : x
  2. Step 2: Convert to fraction form
    12,389.10/18,587.70 = 4,068.78/x
  3. Step 3: Cross multiply
    12,389.10x = 18,587.70 × 4,068.78
  4. Step 4: Simplify right side
    12,389.10x = 75,629,262.01
  5. Step 5: Solve for x
    x = 75,629,262.01/12,389.10
  6. Step 6: Final answer
    x = 6,104.50

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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.