Home / 20,715.90-28,588.32-11,284.62

Finding the Fourth Proportional to 20,715.90, 28,588.32 and 11,284.62

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Solution

The fourth proportional to 20,715.90, 28,588.32 and 11,284.62 is: 15,572.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.90 : 28,588.32 = 11,284.62 : x
  2. Step 2: Convert to fraction form
    20,715.90/28,588.32 = 11,284.62/x
  3. Step 3: Cross multiply
    20,715.90x = 28,588.32 × 11,284.62
  4. Step 4: Simplify right side
    20,715.90x = 322,608,327.64
  5. Step 5: Solve for x
    x = 322,608,327.64/20,715.90
  6. Step 6: Final answer
    x = 15,572.98

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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.