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Finding the Fourth Proportional to 6,359.48, 9,513.28 and 5,128.28

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Solution

The fourth proportional to 6,359.48, 9,513.28 and 5,128.28 is: 7,671.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,359.48 : 9,513.28 = 5,128.28 : x
  2. Step 2: Convert to fraction form
    6,359.48/9,513.28 = 5,128.28/x
  3. Step 3: Cross multiply
    6,359.48x = 9,513.28 × 5,128.28
  4. Step 4: Simplify right side
    6,359.48x = 48,786,763.56
  5. Step 5: Solve for x
    x = 48,786,763.56/6,359.48
  6. Step 6: Final answer
    x = 7,671.50

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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.