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Finding the Fourth Proportional to 8,910.70, 12,290.58 and 5,371

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Solution

The fourth proportional to 8,910.70, 12,290.58 and 5,371 is: 7,408.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,910.70 : 12,290.58 = 5,371 : x
  2. Step 2: Convert to fraction form
    8,910.70/12,290.58 = 5,371/x
  3. Step 3: Cross multiply
    8,910.70x = 12,290.58 × 5,371
  4. Step 4: Simplify right side
    8,910.70x = 66,012,705.18
  5. Step 5: Solve for x
    x = 66,012,705.18/8,910.70
  6. Step 6: Final answer
    x = 7,408.25

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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.