Home / 21,890.48-32,794.20-12,987

Finding the Fourth Proportional to 21,890.48, 32,794.20 and 12,987

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Solution

The fourth proportional to 21,890.48, 32,794.20 and 12,987 is: 19,455.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.48 : 32,794.20 = 12,987 : x
  2. Step 2: Convert to fraction form
    21,890.48/32,794.20 = 12,987/x
  3. Step 3: Cross multiply
    21,890.48x = 32,794.20 × 12,987
  4. Step 4: Simplify right side
    21,890.48x = 425,898,275.40
  5. Step 5: Solve for x
    x = 425,898,275.40/21,890.48
  6. Step 6: Final answer
    x = 19,455.87

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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.