Home / 21,155.60-31,744.26-9,317.66

Finding the Fourth Proportional to 21,155.60, 31,744.26 and 9,317.66

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Solution

The fourth proportional to 21,155.60, 31,744.26 and 9,317.66 is: 13,981.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.60 : 31,744.26 = 9,317.66 : x
  2. Step 2: Convert to fraction form
    21,155.60/31,744.26 = 9,317.66/x
  3. Step 3: Cross multiply
    21,155.60x = 31,744.26 × 9,317.66
  4. Step 4: Simplify right side
    21,155.60x = 295,782,221.63
  5. Step 5: Solve for x
    x = 295,782,221.63/21,155.60
  6. Step 6: Final answer
    x = 13,981.27

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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.