Home / 28,565.36-39,420.20-15,990

Finding the Fourth Proportional to 28,565.36, 39,420.20 and 15,990

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Solution

The fourth proportional to 28,565.36, 39,420.20 and 15,990 is: 22,066.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,565.36 : 39,420.20 = 15,990 : x
  2. Step 2: Convert to fraction form
    28,565.36/39,420.20 = 15,990/x
  3. Step 3: Cross multiply
    28,565.36x = 39,420.20 × 15,990
  4. Step 4: Simplify right side
    28,565.36x = 630,328,998
  5. Step 5: Solve for x
    x = 630,328,998/28,565.36
  6. Step 6: Final answer
    x = 22,066.20

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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.