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Finding the Fourth Proportional to 7,146.40, 10,703.40 and 4,230.40

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Solution

The fourth proportional to 7,146.40, 10,703.40 and 4,230.40 is: 6,336.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,146.40 : 10,703.40 = 4,230.40 : x
  2. Step 2: Convert to fraction form
    7,146.40/10,703.40 = 4,230.40/x
  3. Step 3: Cross multiply
    7,146.40x = 10,703.40 × 4,230.40
  4. Step 4: Simplify right side
    7,146.40x = 45,279,663.36
  5. Step 5: Solve for x
    x = 45,279,663.36/7,146.40
  6. Step 6: Final answer
    x = 6,336.01

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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.