Home / 20,330.85-28,052.88-11,715.69

Finding the Fourth Proportional to 20,330.85, 28,052.88 and 11,715.69

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Solution

The fourth proportional to 20,330.85, 28,052.88 and 11,715.69 is: 16,165.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.85 : 28,052.88 = 11,715.69 : x
  2. Step 2: Convert to fraction form
    20,330.85/28,052.88 = 11,715.69/x
  3. Step 3: Cross multiply
    20,330.85x = 28,052.88 × 11,715.69
  4. Step 4: Simplify right side
    20,330.85x = 328,658,845.69
  5. Step 5: Solve for x
    x = 328,658,845.69/20,330.85
  6. Step 6: Final answer
    x = 16,165.52

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Half scale
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Double scale
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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.