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Finding the Fourth Proportional to 6,128.76, 9,193.18 and 1,511.76

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Solution

The fourth proportional to 6,128.76, 9,193.18 and 1,511.76 is: 2,267.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,128.76 : 9,193.18 = 1,511.76 : x
  2. Step 2: Convert to fraction form
    6,128.76/9,193.18 = 1,511.76/x
  3. Step 3: Cross multiply
    6,128.76x = 9,193.18 × 1,511.76
  4. Step 4: Simplify right side
    6,128.76x = 13,897,881.80
  5. Step 5: Solve for x
    x = 13,897,881.80/6,128.76
  6. Step 6: Final answer
    x = 2,267.65

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Half scale
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Double scale
Find fourth proportional to 6,129.76, 9,194.68 and 1,512.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.