Home / 19,789.11-29,689.88-8,705.12

Finding the Fourth Proportional to 19,789.11, 29,689.88 and 8,705.12

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Solution

The fourth proportional to 19,789.11, 29,689.88 and 8,705.12 is: 13,060.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,789.11 : 29,689.88 = 8,705.12 : x
  2. Step 2: Convert to fraction form
    19,789.11/29,689.88 = 8,705.12/x
  3. Step 3: Cross multiply
    19,789.11x = 29,689.88 × 8,705.12
  4. Step 4: Simplify right side
    19,789.11x = 258,453,776.21
  5. Step 5: Solve for x
    x = 258,453,776.21/19,789.11
  6. Step 6: Final answer
    x = 13,060.40

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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.