Home / 21,188.85-31,777.95-8,712.33

Finding the Fourth Proportional to 21,188.85, 31,777.95 and 8,712.33

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Solution

The fourth proportional to 21,188.85, 31,777.95 and 8,712.33 is: 13,066.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.85 : 31,777.95 = 8,712.33 : x
  2. Step 2: Convert to fraction form
    21,188.85/31,777.95 = 8,712.33/x
  3. Step 3: Cross multiply
    21,188.85x = 31,777.95 × 8,712.33
  4. Step 4: Simplify right side
    21,188.85x = 276,859,987.12
  5. Step 5: Solve for x
    x = 276,859,987.12/21,188.85
  6. Step 6: Final answer
    x = 13,066.31

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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.