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Finding the Fourth Proportional to 18,891.81, 28,341.81 and 6,242.09

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Solution

The fourth proportional to 18,891.81, 28,341.81 and 6,242.09 is: 9,364.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.81 : 28,341.81 = 6,242.09 : x
  2. Step 2: Convert to fraction form
    18,891.81/28,341.81 = 6,242.09/x
  3. Step 3: Cross multiply
    18,891.81x = 28,341.81 × 6,242.09
  4. Step 4: Simplify right side
    18,891.81x = 176,911,987.07
  5. Step 5: Solve for x
    x = 176,911,987.07/18,891.81
  6. Step 6: Final answer
    x = 9,364.48

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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.