Home / 12,387.23-18,581.45-4,990.68

Finding the Fourth Proportional to 12,387.23, 18,581.45 and 4,990.68

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Solution

The fourth proportional to 12,387.23, 18,581.45 and 4,990.68 is: 7,486.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.23 : 18,581.45 = 4,990.68 : x
  2. Step 2: Convert to fraction form
    12,387.23/18,581.45 = 4,990.68/x
  3. Step 3: Cross multiply
    12,387.23x = 18,581.45 × 4,990.68
  4. Step 4: Simplify right side
    12,387.23x = 92,734,070.89
  5. Step 5: Solve for x
    x = 92,734,070.89/12,387.23
  6. Step 6: Final answer
    x = 7,486.26

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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.