Home / 12,587.78-18,880.70-3,822.74

Finding the Fourth Proportional to 12,587.78, 18,880.70 and 3,822.74

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Solution

The fourth proportional to 12,587.78, 18,880.70 and 3,822.74 is: 5,733.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.78 : 18,880.70 = 3,822.74 : x
  2. Step 2: Convert to fraction form
    12,587.78/18,880.70 = 3,822.74/x
  3. Step 3: Cross multiply
    12,587.78x = 18,880.70 × 3,822.74
  4. Step 4: Simplify right side
    12,587.78x = 72,176,007.12
  5. Step 5: Solve for x
    x = 72,176,007.12/12,587.78
  6. Step 6: Final answer
    x = 5,733.82

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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.