Home / 12,904.40-19,358.76-4,138.40

Finding the Fourth Proportional to 12,904.40, 19,358.76 and 4,138.40

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Solution

The fourth proportional to 12,904.40, 19,358.76 and 4,138.40 is: 6,208.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.40 : 19,358.76 = 4,138.40 : x
  2. Step 2: Convert to fraction form
    12,904.40/19,358.76 = 4,138.40/x
  3. Step 3: Cross multiply
    12,904.40x = 19,358.76 × 4,138.40
  4. Step 4: Simplify right side
    12,904.40x = 80,114,292.38
  5. Step 5: Solve for x
    x = 80,114,292.38/12,904.40
  6. Step 6: Final answer
    x = 6,208.29

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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.