Home / 21,189.93-31,789.01-8,051.55

Finding the Fourth Proportional to 21,189.93, 31,789.01 and 8,051.55

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Solution

The fourth proportional to 21,189.93, 31,789.01 and 8,051.55 is: 12,078.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.93 : 31,789.01 = 8,051.55 : x
  2. Step 2: Convert to fraction form
    21,189.93/31,789.01 = 8,051.55/x
  3. Step 3: Cross multiply
    21,189.93x = 31,789.01 × 8,051.55
  4. Step 4: Simplify right side
    21,189.93x = 255,950,803.47
  5. Step 5: Solve for x
    x = 255,950,803.47/21,189.93
  6. Step 6: Final answer
    x = 12,078.89

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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.