Home / 19,817.70-29,726.55-8,139.30

Finding the Fourth Proportional to 19,817.70, 29,726.55 and 8,139.30

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Solution

The fourth proportional to 19,817.70, 29,726.55 and 8,139.30 is: 12,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,817.70 : 29,726.55 = 8,139.30 : x
  2. Step 2: Convert to fraction form
    19,817.70/29,726.55 = 8,139.30/x
  3. Step 3: Cross multiply
    19,817.70x = 29,726.55 × 8,139.30
  4. Step 4: Simplify right side
    19,817.70x = 241,953,308.42
  5. Step 5: Solve for x
    x = 241,953,308.42/19,817.70
  6. Step 6: Final answer
    x = 12,208.95

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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.