Home / 12,387.02-18,581.27-4,991.45

Finding the Fourth Proportional to 12,387.02, 18,581.27 and 4,991.45

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Solution

The fourth proportional to 12,387.02, 18,581.27 and 4,991.45 is: 7,487.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.02 : 18,581.27 = 4,991.45 : x
  2. Step 2: Convert to fraction form
    12,387.02/18,581.27 = 4,991.45/x
  3. Step 3: Cross multiply
    12,387.02x = 18,581.27 × 4,991.45
  4. Step 4: Simplify right side
    12,387.02x = 92,747,362.28
  5. Step 5: Solve for x
    x = 92,747,362.28/12,387.02
  6. Step 6: Final answer
    x = 7,487.47

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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.