Home / 8,428.78-12,643.71-2,584.63

Finding the Fourth Proportional to 8,428.78, 12,643.71 and 2,584.63

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Solution

The fourth proportional to 8,428.78, 12,643.71 and 2,584.63 is: 3,877.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.78 : 12,643.71 = 2,584.63 : x
  2. Step 2: Convert to fraction form
    8,428.78/12,643.71 = 2,584.63/x
  3. Step 3: Cross multiply
    8,428.78x = 12,643.71 × 2,584.63
  4. Step 4: Simplify right side
    8,428.78x = 32,679,312.18
  5. Step 5: Solve for x
    x = 32,679,312.18/8,428.78
  6. Step 6: Final answer
    x = 3,877.11

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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.