Home / 21,042.92-31,606.40-13,159.46

Finding the Fourth Proportional to 21,042.92, 31,606.40 and 13,159.46

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Solution

The fourth proportional to 21,042.92, 31,606.40 and 13,159.46 is: 19,765.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.92 : 31,606.40 = 13,159.46 : x
  2. Step 2: Convert to fraction form
    21,042.92/31,606.40 = 13,159.46/x
  3. Step 3: Cross multiply
    21,042.92x = 31,606.40 × 13,159.46
  4. Step 4: Simplify right side
    21,042.92x = 415,923,156.54
  5. Step 5: Solve for x
    x = 415,923,156.54/21,042.92
  6. Step 6: Final answer
    x = 19,765.47

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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.