Home / 19,221.75-28,818.59-12,966.21

Finding the Fourth Proportional to 19,221.75, 28,818.59 and 12,966.21

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Solution

The fourth proportional to 19,221.75, 28,818.59 and 12,966.21 is: 19,439.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,221.75 : 28,818.59 = 12,966.21 : x
  2. Step 2: Convert to fraction form
    19,221.75/28,818.59 = 12,966.21/x
  3. Step 3: Cross multiply
    19,221.75x = 28,818.59 × 12,966.21
  4. Step 4: Simplify right side
    19,221.75x = 373,667,825.01
  5. Step 5: Solve for x
    x = 373,667,825.01/19,221.75
  6. Step 6: Final answer
    x = 19,439.84

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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.