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Finding the Fourth Proportional to 18,613.65, 27,909.92 and 6,130.28

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Solution

The fourth proportional to 18,613.65, 27,909.92 and 6,130.28 is: 9,191.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,613.65 : 27,909.92 = 6,130.28 : x
  2. Step 2: Convert to fraction form
    18,613.65/27,909.92 = 6,130.28/x
  3. Step 3: Cross multiply
    18,613.65x = 27,909.92 × 6,130.28
  4. Step 4: Simplify right side
    18,613.65x = 171,095,675.00
  5. Step 5: Solve for x
    x = 171,095,675.00/18,613.65
  6. Step 6: Final answer
    x = 9,191.95

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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.