Home / 19,785.90-29,686.68-8,684.85

Finding the Fourth Proportional to 19,785.90, 29,686.68 and 8,684.85

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Solution

The fourth proportional to 19,785.90, 29,686.68 and 8,684.85 is: 13,030.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,785.90 : 29,686.68 = 8,684.85 : x
  2. Step 2: Convert to fraction form
    19,785.90/29,686.68 = 8,684.85/x
  3. Step 3: Cross multiply
    19,785.90x = 29,686.68 × 8,684.85
  4. Step 4: Simplify right side
    19,785.90x = 257,824,362.80
  5. Step 5: Solve for x
    x = 257,824,362.80/19,785.90
  6. Step 6: Final answer
    x = 13,030.71

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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.