Home / 12,587.98-18,880.66-4,267.78

Finding the Fourth Proportional to 12,587.98, 18,880.66 and 4,267.78

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Solution

The fourth proportional to 12,587.98, 18,880.66 and 4,267.78 is: 6,401.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.98 : 18,880.66 = 4,267.78 : x
  2. Step 2: Convert to fraction form
    12,587.98/18,880.66 = 4,267.78/x
  3. Step 3: Cross multiply
    12,587.98x = 18,880.66 × 4,267.78
  4. Step 4: Simplify right side
    12,587.98x = 80,578,503.13
  5. Step 5: Solve for x
    x = 80,578,503.13/12,587.98
  6. Step 6: Final answer
    x = 6,401.23

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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.