Home / 20,341.79-28,072.27-11,389.21

Finding the Fourth Proportional to 20,341.79, 28,072.27 and 11,389.21

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Solution

The fourth proportional to 20,341.79, 28,072.27 and 11,389.21 is: 15,717.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,341.79 : 28,072.27 = 11,389.21 : x
  2. Step 2: Convert to fraction form
    20,341.79/28,072.27 = 11,389.21/x
  3. Step 3: Cross multiply
    20,341.79x = 28,072.27 × 11,389.21
  4. Step 4: Simplify right side
    20,341.79x = 319,720,837.85
  5. Step 5: Solve for x
    x = 319,720,837.85/20,341.79
  6. Step 6: Final answer
    x = 15,717.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.