Home / 20,715.26-28,587.93-11,284.34

Finding the Fourth Proportional to 20,715.26, 28,587.93 and 11,284.34

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Solution

The fourth proportional to 20,715.26, 28,587.93 and 11,284.34 is: 15,572.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.26 : 28,587.93 = 11,284.34 : x
  2. Step 2: Convert to fraction form
    20,715.26/28,587.93 = 11,284.34/x
  3. Step 3: Cross multiply
    20,715.26x = 28,587.93 × 11,284.34
  4. Step 4: Simplify right side
    20,715.26x = 322,595,922.02
  5. Step 5: Solve for x
    x = 322,595,922.02/20,715.26
  6. Step 6: Final answer
    x = 15,572.86

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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.