Home / 20,716.65-28,588.71-11,285.22

Finding the Fourth Proportional to 20,716.65, 28,588.71 and 11,285.22

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Solution

The fourth proportional to 20,716.65, 28,588.71 and 11,285.22 is: 15,573.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.65 : 28,588.71 = 11,285.22 : x
  2. Step 2: Convert to fraction form
    20,716.65/28,588.71 = 11,285.22/x
  3. Step 3: Cross multiply
    20,716.65x = 28,588.71 × 11,285.22
  4. Step 4: Simplify right side
    20,716.65x = 322,629,881.87
  5. Step 5: Solve for x
    x = 322,629,881.87/20,716.65
  6. Step 6: Final answer
    x = 15,573.46

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1.5x scale

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.