Home / 19,920.36-29,869.04-11,923.12

Finding the Fourth Proportional to 19,920.36, 29,869.04 and 11,923.12

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Solution

The fourth proportional to 19,920.36, 29,869.04 and 11,923.12 is: 17,877.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.36 : 29,869.04 = 11,923.12 : x
  2. Step 2: Convert to fraction form
    19,920.36/29,869.04 = 11,923.12/x
  3. Step 3: Cross multiply
    19,920.36x = 29,869.04 × 11,923.12
  4. Step 4: Simplify right side
    19,920.36x = 356,132,148.20
  5. Step 5: Solve for x
    x = 356,132,148.20/19,920.36
  6. Step 6: Final answer
    x = 17,877.80

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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.