Home / 21,161.52-31,555.98-19,684.08

Finding the Fourth Proportional to 21,161.52, 31,555.98 and 19,684.08

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Solution

The fourth proportional to 21,161.52, 31,555.98 and 19,684.08 is: 29,352.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.52 : 31,555.98 = 19,684.08 : x
  2. Step 2: Convert to fraction form
    21,161.52/31,555.98 = 19,684.08/x
  3. Step 3: Cross multiply
    21,161.52x = 31,555.98 × 19,684.08
  4. Step 4: Simplify right side
    21,161.52x = 621,150,434.80
  5. Step 5: Solve for x
    x = 621,150,434.80/21,161.52
  6. Step 6: Final answer
    x = 29,352.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.