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Finding the Fourth Proportional to 7,899.76, 10,901.88 and 4,543.21

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Solution

The fourth proportional to 7,899.76, 10,901.88 and 4,543.21 is: 6,269.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,899.76 : 10,901.88 = 4,543.21 : x
  2. Step 2: Convert to fraction form
    7,899.76/10,901.88 = 4,543.21/x
  3. Step 3: Cross multiply
    7,899.76x = 10,901.88 × 4,543.21
  4. Step 4: Simplify right side
    7,899.76x = 49,529,530.23
  5. Step 5: Solve for x
    x = 49,529,530.23/7,899.76
  6. Step 6: Final answer
    x = 6,269.75

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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.