Home / 20,869.77-31,118.49-18,551.55

Finding the Fourth Proportional to 20,869.77, 31,118.49 and 18,551.55

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Solution

The fourth proportional to 20,869.77, 31,118.49 and 18,551.55 is: 27,661.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.77 : 31,118.49 = 18,551.55 : x
  2. Step 2: Convert to fraction form
    20,869.77/31,118.49 = 18,551.55/x
  3. Step 3: Cross multiply
    20,869.77x = 31,118.49 × 18,551.55
  4. Step 4: Simplify right side
    20,869.77x = 577,296,223.16
  5. Step 5: Solve for x
    x = 577,296,223.16/20,869.77
  6. Step 6: Final answer
    x = 27,661.84

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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.