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Finding the Fourth Proportional to 19,140.30, 28,713.15 and 5,991.30

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Solution

The fourth proportional to 19,140.30, 28,713.15 and 5,991.30 is: 8,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.30 : 28,713.15 = 5,991.30 : x
  2. Step 2: Convert to fraction form
    19,140.30/28,713.15 = 5,991.30/x
  3. Step 3: Cross multiply
    19,140.30x = 28,713.15 × 5,991.30
  4. Step 4: Simplify right side
    19,140.30x = 172,029,095.60
  5. Step 5: Solve for x
    x = 172,029,095.60/19,140.30
  6. Step 6: Final answer
    x = 8,987.80

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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.