Home / 20,869.95-31,118.77-18,551.73

Finding the Fourth Proportional to 20,869.95, 31,118.77 and 18,551.73

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Solution

The fourth proportional to 20,869.95, 31,118.77 and 18,551.73 is: 27,662.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.95 : 31,118.77 = 18,551.73 : x
  2. Step 2: Convert to fraction form
    20,869.95/31,118.77 = 18,551.73/x
  3. Step 3: Cross multiply
    20,869.95x = 31,118.77 × 18,551.73
  4. Step 4: Simplify right side
    20,869.95x = 577,307,054.50
  5. Step 5: Solve for x
    x = 577,307,054.50/20,869.95
  6. Step 6: Final answer
    x = 27,662.11

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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.