Home / 20,992.85-31,335.69-18,501.81

Finding the Fourth Proportional to 20,992.85, 31,335.69 and 18,501.81

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Solution

The fourth proportional to 20,992.85, 31,335.69 and 18,501.81 is: 27,617.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.85 : 31,335.69 = 18,501.81 : x
  2. Step 2: Convert to fraction form
    20,992.85/31,335.69 = 18,501.81/x
  3. Step 3: Cross multiply
    20,992.85x = 31,335.69 × 18,501.81
  4. Step 4: Simplify right side
    20,992.85x = 579,766,936.34
  5. Step 5: Solve for x
    x = 579,766,936.34/20,992.85
  6. Step 6: Final answer
    x = 27,617.35

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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.