Home / 18,943.66-28,403.88-7,858

Finding the Fourth Proportional to 18,943.66, 28,403.88 and 7,858

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Solution

The fourth proportional to 18,943.66, 28,403.88 and 7,858 is: 11,782.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,943.66 : 28,403.88 = 7,858 : x
  2. Step 2: Convert to fraction form
    18,943.66/28,403.88 = 7,858/x
  3. Step 3: Cross multiply
    18,943.66x = 28,403.88 × 7,858
  4. Step 4: Simplify right side
    18,943.66x = 223,197,689.04
  5. Step 5: Solve for x
    x = 223,197,689.04/18,943.66
  6. Step 6: Final answer
    x = 11,782.18

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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.