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Finding the Fourth Proportional to 8,692.79, 11,994.95 and 5,155.31

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Solution

The fourth proportional to 8,692.79, 11,994.95 and 5,155.31 is: 7,113.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.79 : 11,994.95 = 5,155.31 : x
  2. Step 2: Convert to fraction form
    8,692.79/11,994.95 = 5,155.31/x
  3. Step 3: Cross multiply
    8,692.79x = 11,994.95 × 5,155.31
  4. Step 4: Simplify right side
    8,692.79x = 61,837,728.56
  5. Step 5: Solve for x
    x = 61,837,728.56/8,692.79
  6. Step 6: Final answer
    x = 7,113.68

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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.