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Finding the Fourth Proportional to 18,407.91, 27,615.94 and 6,721.13

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Solution

The fourth proportional to 18,407.91, 27,615.94 and 6,721.13 is: 10,083.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,407.91 : 27,615.94 = 6,721.13 : x
  2. Step 2: Convert to fraction form
    18,407.91/27,615.94 = 6,721.13/x
  3. Step 3: Cross multiply
    18,407.91x = 27,615.94 × 6,721.13
  4. Step 4: Simplify right side
    18,407.91x = 185,610,219.71
  5. Step 5: Solve for x
    x = 185,610,219.71/18,407.91
  6. Step 6: Final answer
    x = 10,083.18

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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.