Home / 20,521.15-28,317.45-11,570.10

Finding the Fourth Proportional to 20,521.15, 28,317.45 and 11,570.10

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Solution

The fourth proportional to 20,521.15, 28,317.45 and 11,570.10 is: 15,965.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.15 : 28,317.45 = 11,570.10 : x
  2. Step 2: Convert to fraction form
    20,521.15/28,317.45 = 11,570.10/x
  3. Step 3: Cross multiply
    20,521.15x = 28,317.45 × 11,570.10
  4. Step 4: Simplify right side
    20,521.15x = 327,635,728.25
  5. Step 5: Solve for x
    x = 327,635,728.25/20,521.15
  6. Step 6: Final answer
    x = 15,965.76

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