Home / 15,870.90-21,894.48-11,157.96

Finding the Fourth Proportional to 15,870.90, 21,894.48 and 11,157.96

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Solution

The fourth proportional to 15,870.90, 21,894.48 and 11,157.96 is: 15,392.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.90 : 21,894.48 = 11,157.96 : x
  2. Step 2: Convert to fraction form
    15,870.90/21,894.48 = 11,157.96/x
  3. Step 3: Cross multiply
    15,870.90x = 21,894.48 × 11,157.96
  4. Step 4: Simplify right side
    15,870.90x = 244,297,732.06
  5. Step 5: Solve for x
    x = 244,297,732.06/15,870.90
  6. Step 6: Final answer
    x = 15,392.81

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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.