Home / 20,866.61-31,148.35-19,324.78

Finding the Fourth Proportional to 20,866.61, 31,148.35 and 19,324.78

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Solution

The fourth proportional to 20,866.61, 31,148.35 and 19,324.78 is: 28,846.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.61 : 31,148.35 = 19,324.78 : x
  2. Step 2: Convert to fraction form
    20,866.61/31,148.35 = 19,324.78/x
  3. Step 3: Cross multiply
    20,866.61x = 31,148.35 × 19,324.78
  4. Step 4: Simplify right side
    20,866.61x = 601,934,884.93
  5. Step 5: Solve for x
    x = 601,934,884.93/20,866.61
  6. Step 6: Final answer
    x = 28,846.79

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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.