Home / 20,860.72-31,291.36-7,712.96

Finding the Fourth Proportional to 20,860.72, 31,291.36 and 7,712.96

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Solution

The fourth proportional to 20,860.72, 31,291.36 and 7,712.96 is: 11,569.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.72 : 31,291.36 = 7,712.96 : x
  2. Step 2: Convert to fraction form
    20,860.72/31,291.36 = 7,712.96/x
  3. Step 3: Cross multiply
    20,860.72x = 31,291.36 × 7,712.96
  4. Step 4: Simplify right side
    20,860.72x = 241,349,008.03
  5. Step 5: Solve for x
    x = 241,349,008.03/20,860.72
  6. Step 6: Final answer
    x = 11,569.54

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1.5x scale

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.