Home / 18,878.29-28,317.30-6,407.09

Finding the Fourth Proportional to 18,878.29, 28,317.30 and 6,407.09

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Solution

The fourth proportional to 18,878.29, 28,317.30 and 6,407.09 is: 9,610.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.29 : 28,317.30 = 6,407.09 : x
  2. Step 2: Convert to fraction form
    18,878.29/28,317.30 = 6,407.09/x
  3. Step 3: Cross multiply
    18,878.29x = 28,317.30 × 6,407.09
  4. Step 4: Simplify right side
    18,878.29x = 181,431,637.57
  5. Step 5: Solve for x
    x = 181,431,637.57/18,878.29
  6. Step 6: Final answer
    x = 9,610.60

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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.