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Finding the Fourth Proportional to 5,271.76, 7,905.16 and 3,081.12

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Solution

The fourth proportional to 5,271.76, 7,905.16 and 3,081.12 is: 4,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,271.76 : 7,905.16 = 3,081.12 : x
  2. Step 2: Convert to fraction form
    5,271.76/7,905.16 = 3,081.12/x
  3. Step 3: Cross multiply
    5,271.76x = 7,905.16 × 3,081.12
  4. Step 4: Simplify right side
    5,271.76x = 24,356,746.58
  5. Step 5: Solve for x
    x = 24,356,746.58/5,271.76
  6. Step 6: Final answer
    x = 4,620.23

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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.