Home / 19,117.90-28,680.90-5,789.80

Finding the Fourth Proportional to 19,117.90, 28,680.90 and 5,789.80

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Solution

The fourth proportional to 19,117.90, 28,680.90 and 5,789.80 is: 8,685.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,117.90 : 28,680.90 = 5,789.80 : x
  2. Step 2: Convert to fraction form
    19,117.90/28,680.90 = 5,789.80/x
  3. Step 3: Cross multiply
    19,117.90x = 28,680.90 × 5,789.80
  4. Step 4: Simplify right side
    19,117.90x = 166,056,674.82
  5. Step 5: Solve for x
    x = 166,056,674.82/19,117.90
  6. Step 6: Final answer
    x = 8,685.93

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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.