Home / 20,715.85-28,587.72-11,284.41

Finding the Fourth Proportional to 20,715.85, 28,587.72 and 11,284.41

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Solution

The fourth proportional to 20,715.85, 28,587.72 and 11,284.41 is: 15,572.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.85 : 28,587.72 = 11,284.41 : x
  2. Step 2: Convert to fraction form
    20,715.85/28,587.72 = 11,284.41/x
  3. Step 3: Cross multiply
    20,715.85x = 28,587.72 × 11,284.41
  4. Step 4: Simplify right side
    20,715.85x = 322,595,595.76
  5. Step 5: Solve for x
    x = 322,595,595.76/20,715.85
  6. Step 6: Final answer
    x = 15,572.41

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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.