Home / 20,923.36-28,882.10-13,859.36

Finding the Fourth Proportional to 20,923.36, 28,882.10 and 13,859.36

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Solution

The fourth proportional to 20,923.36, 28,882.10 and 13,859.36 is: 19,131.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.36 : 28,882.10 = 13,859.36 : x
  2. Step 2: Convert to fraction form
    20,923.36/28,882.10 = 13,859.36/x
  3. Step 3: Cross multiply
    20,923.36x = 28,882.10 × 13,859.36
  4. Step 4: Simplify right side
    20,923.36x = 400,287,421.46
  5. Step 5: Solve for x
    x = 400,287,421.46/20,923.36
  6. Step 6: Final answer
    x = 19,131.13

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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.