Home / 18,643.02-27,964.50-12,781.86

Finding the Fourth Proportional to 18,643.02, 27,964.50 and 12,781.86

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Solution

The fourth proportional to 18,643.02, 27,964.50 and 12,781.86 is: 19,172.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.02 : 27,964.50 = 12,781.86 : x
  2. Step 2: Convert to fraction form
    18,643.02/27,964.50 = 12,781.86/x
  3. Step 3: Cross multiply
    18,643.02x = 27,964.50 × 12,781.86
  4. Step 4: Simplify right side
    18,643.02x = 357,438,323.97
  5. Step 5: Solve for x
    x = 357,438,323.97/18,643.02
  6. Step 6: Final answer
    x = 19,172.77

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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.