Home / 12,078.08-18,117.12-3,875.84

Finding the Fourth Proportional to 12,078.08, 18,117.12 and 3,875.84

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Solution

The fourth proportional to 12,078.08, 18,117.12 and 3,875.84 is: 5,813.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.08 : 18,117.12 = 3,875.84 : x
  2. Step 2: Convert to fraction form
    12,078.08/18,117.12 = 3,875.84/x
  3. Step 3: Cross multiply
    12,078.08x = 18,117.12 × 3,875.84
  4. Step 4: Simplify right side
    12,078.08x = 70,219,058.38
  5. Step 5: Solve for x
    x = 70,219,058.38/12,078.08
  6. Step 6: Final answer
    x = 5,813.76

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Half scale
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Double scale
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Similar ratio
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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.