Home / 21,055.66-31,586.82-7,909.04

Finding the Fourth Proportional to 21,055.66, 31,586.82 and 7,909.04

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Solution

The fourth proportional to 21,055.66, 31,586.82 and 7,909.04 is: 11,864.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.66 : 31,586.82 = 7,909.04 : x
  2. Step 2: Convert to fraction form
    21,055.66/31,586.82 = 7,909.04/x
  3. Step 3: Cross multiply
    21,055.66x = 31,586.82 × 7,909.04
  4. Step 4: Simplify right side
    21,055.66x = 249,821,422.85
  5. Step 5: Solve for x
    x = 249,821,422.85/21,055.66
  6. Step 6: Final answer
    x = 11,864.81

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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.