Home / 12,390.48-18,589.37-4,991.13

Finding the Fourth Proportional to 12,390.48, 18,589.37 and 4,991.13

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Solution

The fourth proportional to 12,390.48, 18,589.37 and 4,991.13 is: 7,488.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.48 : 18,589.37 = 4,991.13 : x
  2. Step 2: Convert to fraction form
    12,390.48/18,589.37 = 4,991.13/x
  3. Step 3: Cross multiply
    12,390.48x = 18,589.37 × 4,991.13
  4. Step 4: Simplify right side
    12,390.48x = 92,781,937.33
  5. Step 5: Solve for x
    x = 92,781,937.33/12,390.48
  6. Step 6: Final answer
    x = 7,488.16

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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.