Home / 12,961.40-19,442.10-12,864.20

Finding the Fourth Proportional to 12,961.40, 19,442.10 and 12,864.20

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Solution

The fourth proportional to 12,961.40, 19,442.10 and 12,864.20 is: 19,296.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,961.40 : 19,442.10 = 12,864.20 : x
  2. Step 2: Convert to fraction form
    12,961.40/19,442.10 = 12,864.20/x
  3. Step 3: Cross multiply
    12,961.40x = 19,442.10 × 12,864.20
  4. Step 4: Simplify right side
    12,961.40x = 250,107,062.82
  5. Step 5: Solve for x
    x = 250,107,062.82/12,961.40
  6. Step 6: Final answer
    x = 19,296.30

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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.