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Finding the Fourth Proportional to 5,391, 8,086.54 and 1,880.99

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Solution

The fourth proportional to 5,391, 8,086.54 and 1,880.99 is: 2,821.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391 : 8,086.54 = 1,880.99 : x
  2. Step 2: Convert to fraction form
    5,391/8,086.54 = 1,880.99/x
  3. Step 3: Cross multiply
    5,391x = 8,086.54 × 1,880.99
  4. Step 4: Simplify right side
    5,391x = 15,210,711.69
  5. Step 5: Solve for x
    x = 15,210,711.69/5,391
  6. Step 6: Final answer
    x = 2,821.50

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Double scale
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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.