Home / 8,431.78-12,646.59-2,587.90

Finding the Fourth Proportional to 8,431.78, 12,646.59 and 2,587.90

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Solution

The fourth proportional to 8,431.78, 12,646.59 and 2,587.90 is: 3,881.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.78 : 12,646.59 = 2,587.90 : x
  2. Step 2: Convert to fraction form
    8,431.78/12,646.59 = 2,587.90/x
  3. Step 3: Cross multiply
    8,431.78x = 12,646.59 × 2,587.90
  4. Step 4: Simplify right side
    8,431.78x = 32,728,068.94
  5. Step 5: Solve for x
    x = 32,728,068.94/8,431.78
  6. Step 6: Final answer
    x = 3,881.51

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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.