Home / 28,574.30-39,431.40-15,998.78

Finding the Fourth Proportional to 28,574.30, 39,431.40 and 15,998.78

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Solution

The fourth proportional to 28,574.30, 39,431.40 and 15,998.78 is: 22,077.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,574.30 : 39,431.40 = 15,998.78 : x
  2. Step 2: Convert to fraction form
    28,574.30/39,431.40 = 15,998.78/x
  3. Step 3: Cross multiply
    28,574.30x = 39,431.40 × 15,998.78
  4. Step 4: Simplify right side
    28,574.30x = 630,854,293.69
  5. Step 5: Solve for x
    x = 630,854,293.69/28,574.30
  6. Step 6: Final answer
    x = 22,077.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.