Home / 19,899.68-29,855.76-8,218.40

Finding the Fourth Proportional to 19,899.68, 29,855.76 and 8,218.40

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Solution

The fourth proportional to 19,899.68, 29,855.76 and 8,218.40 is: 12,330.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,899.68 : 29,855.76 = 8,218.40 : x
  2. Step 2: Convert to fraction form
    19,899.68/29,855.76 = 8,218.40/x
  3. Step 3: Cross multiply
    19,899.68x = 29,855.76 × 8,218.40
  4. Step 4: Simplify right side
    19,899.68x = 245,366,577.98
  5. Step 5: Solve for x
    x = 245,366,577.98/19,899.68
  6. Step 6: Final answer
    x = 12,330.18

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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.