Home / 12,897.90-19,346.85-4,139.10

Finding the Fourth Proportional to 12,897.90, 19,346.85 and 4,139.10

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Solution

The fourth proportional to 12,897.90, 19,346.85 and 4,139.10 is: 6,208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,897.90 : 19,346.85 = 4,139.10 : x
  2. Step 2: Convert to fraction form
    12,897.90/19,346.85 = 4,139.10/x
  3. Step 3: Cross multiply
    12,897.90x = 19,346.85 × 4,139.10
  4. Step 4: Simplify right side
    12,897.90x = 80,078,546.84
  5. Step 5: Solve for x
    x = 80,078,546.84/12,897.90
  6. Step 6: Final answer
    x = 6,208.65

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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.