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Finding the Fourth Proportional to 7,148.36, 9,861.44 and 4,631.31

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Solution

The fourth proportional to 7,148.36, 9,861.44 and 4,631.31 is: 6,389.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,148.36 : 9,861.44 = 4,631.31 : x
  2. Step 2: Convert to fraction form
    7,148.36/9,861.44 = 4,631.31/x
  3. Step 3: Cross multiply
    7,148.36x = 9,861.44 × 4,631.31
  4. Step 4: Simplify right side
    7,148.36x = 45,671,385.69
  5. Step 5: Solve for x
    x = 45,671,385.69/7,148.36
  6. Step 6: Final answer
    x = 6,389.07

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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.