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Finding the Fourth Proportional to 7,260.64, 10,019.90 and 5,139.96

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Solution

The fourth proportional to 7,260.64, 10,019.90 and 5,139.96 is: 7,093.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,260.64 : 10,019.90 = 5,139.96 : x
  2. Step 2: Convert to fraction form
    7,260.64/10,019.90 = 5,139.96/x
  3. Step 3: Cross multiply
    7,260.64x = 10,019.90 × 5,139.96
  4. Step 4: Simplify right side
    7,260.64x = 51,501,860.48
  5. Step 5: Solve for x
    x = 51,501,860.48/7,260.64
  6. Step 6: Final answer
    x = 7,093.30

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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.