Home / 5,377.76-7,421.90-3,140.19

Finding the Fourth Proportional to 5,377.76, 7,421.90 and 3,140.19

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Solution

The fourth proportional to 5,377.76, 7,421.90 and 3,140.19 is: 4,333.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,377.76 : 7,421.90 = 3,140.19 : x
  2. Step 2: Convert to fraction form
    5,377.76/7,421.90 = 3,140.19/x
  3. Step 3: Cross multiply
    5,377.76x = 7,421.90 × 3,140.19
  4. Step 4: Simplify right side
    5,377.76x = 23,306,176.16
  5. Step 5: Solve for x
    x = 23,306,176.16/5,377.76
  6. Step 6: Final answer
    x = 4,333.81

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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.