Home / 20,908.40-31,326.06-17,420.81

Finding the Fourth Proportional to 20,908.40, 31,326.06 and 17,420.81

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Solution

The fourth proportional to 20,908.40, 31,326.06 and 17,420.81 is: 26,100.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.40 : 31,326.06 = 17,420.81 : x
  2. Step 2: Convert to fraction form
    20,908.40/31,326.06 = 17,420.81/x
  3. Step 3: Cross multiply
    20,908.40x = 31,326.06 × 17,420.81
  4. Step 4: Simplify right side
    20,908.40x = 545,725,339.31
  5. Step 5: Solve for x
    x = 545,725,339.31/20,908.40
  6. Step 6: Final answer
    x = 26,100.77

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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.