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Finding the Fourth Proportional to 7,861.40, 10,848.60 and 4,276.40

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Solution

The fourth proportional to 7,861.40, 10,848.60 and 4,276.40 is: 5,901.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.40 : 10,848.60 = 4,276.40 : x
  2. Step 2: Convert to fraction form
    7,861.40/10,848.60 = 4,276.40/x
  3. Step 3: Cross multiply
    7,861.40x = 10,848.60 × 4,276.40
  4. Step 4: Simplify right side
    7,861.40x = 46,392,953.04
  5. Step 5: Solve for x
    x = 46,392,953.04/7,861.40
  6. Step 6: Final answer
    x = 5,901.36

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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.