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Finding the Fourth Proportional to 8,671.90, 11,967.65 and 5,314.90

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Solution

The fourth proportional to 8,671.90, 11,967.65 and 5,314.90 is: 7,334.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.90 : 11,967.65 = 5,314.90 : x
  2. Step 2: Convert to fraction form
    8,671.90/11,967.65 = 5,314.90/x
  3. Step 3: Cross multiply
    8,671.90x = 11,967.65 × 5,314.90
  4. Step 4: Simplify right side
    8,671.90x = 63,606,862.99
  5. Step 5: Solve for x
    x = 63,606,862.99/8,671.90
  6. Step 6: Final answer
    x = 7,334.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.