Home / 21,215.58-31,823.18-12,897.92

Finding the Fourth Proportional to 21,215.58, 31,823.18 and 12,897.92

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Solution

The fourth proportional to 21,215.58, 31,823.18 and 12,897.92 is: 19,346.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.58 : 31,823.18 = 12,897.92 : x
  2. Step 2: Convert to fraction form
    21,215.58/31,823.18 = 12,897.92/x
  3. Step 3: Cross multiply
    21,215.58x = 31,823.18 × 12,897.92
  4. Step 4: Simplify right side
    21,215.58x = 410,452,829.79
  5. Step 5: Solve for x
    x = 410,452,829.79/21,215.58
  6. Step 6: Final answer
    x = 19,346.76

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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.