Home / 12,289.32-18,436.50-4,391.10

Finding the Fourth Proportional to 12,289.32, 18,436.50 and 4,391.10

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Solution

The fourth proportional to 12,289.32, 18,436.50 and 4,391.10 is: 6,587.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.32 : 18,436.50 = 4,391.10 : x
  2. Step 2: Convert to fraction form
    12,289.32/18,436.50 = 4,391.10/x
  3. Step 3: Cross multiply
    12,289.32x = 18,436.50 × 4,391.10
  4. Step 4: Simplify right side
    12,289.32x = 80,956,515.15
  5. Step 5: Solve for x
    x = 80,956,515.15/12,289.32
  6. Step 6: Final answer
    x = 6,587.55

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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.