Home / 17,838.20-26,731.70-13,121.40

Finding the Fourth Proportional to 17,838.20, 26,731.70 and 13,121.40

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Solution

The fourth proportional to 17,838.20, 26,731.70 and 13,121.40 is: 19,663.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,838.20 : 26,731.70 = 13,121.40 : x
  2. Step 2: Convert to fraction form
    17,838.20/26,731.70 = 13,121.40/x
  3. Step 3: Cross multiply
    17,838.20x = 26,731.70 × 13,121.40
  4. Step 4: Simplify right side
    17,838.20x = 350,757,328.38
  5. Step 5: Solve for x
    x = 350,757,328.38/17,838.20
  6. Step 6: Final answer
    x = 19,663.27

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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.