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Finding the Fourth Proportional to 13,678.86, 18,851.04 and 9,895.61

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Solution

The fourth proportional to 13,678.86, 18,851.04 and 9,895.61 is: 13,637.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.86 : 18,851.04 = 9,895.61 : x
  2. Step 2: Convert to fraction form
    13,678.86/18,851.04 = 9,895.61/x
  3. Step 3: Cross multiply
    13,678.86x = 18,851.04 × 9,895.61
  4. Step 4: Simplify right side
    13,678.86x = 186,542,539.93
  5. Step 5: Solve for x
    x = 186,542,539.93/13,678.86
  6. Step 6: Final answer
    x = 13,637.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.