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Finding the Fourth Proportional to 12,235.68, 16,878.69 and 7,751.52

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Solution

The fourth proportional to 12,235.68, 16,878.69 and 7,751.52 is: 10,692.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,235.68 : 16,878.69 = 7,751.52 : x
  2. Step 2: Convert to fraction form
    12,235.68/16,878.69 = 7,751.52/x
  3. Step 3: Cross multiply
    12,235.68x = 16,878.69 × 7,751.52
  4. Step 4: Simplify right side
    12,235.68x = 130,835,503.11
  5. Step 5: Solve for x
    x = 130,835,503.11/12,235.68
  6. Step 6: Final answer
    x = 10,692.95

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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.