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Finding the Fourth Proportional to 8,649.90, 12,977.10 and 2,807.10

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Solution

The fourth proportional to 8,649.90, 12,977.10 and 2,807.10 is: 4,211.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.90 : 12,977.10 = 2,807.10 : x
  2. Step 2: Convert to fraction form
    8,649.90/12,977.10 = 2,807.10/x
  3. Step 3: Cross multiply
    8,649.90x = 12,977.10 × 2,807.10
  4. Step 4: Simplify right side
    8,649.90x = 36,428,017.41
  5. Step 5: Solve for x
    x = 36,428,017.41/8,649.90
  6. Step 6: Final answer
    x = 4,211.38

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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.