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Finding the Fourth Proportional to 6,628.64, 9,939.36 and 4,288.32

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Solution

The fourth proportional to 6,628.64, 9,939.36 and 4,288.32 is: 6,430.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628.64 : 9,939.36 = 4,288.32 : x
  2. Step 2: Convert to fraction form
    6,628.64/9,939.36 = 4,288.32/x
  3. Step 3: Cross multiply
    6,628.64x = 9,939.36 × 4,288.32
  4. Step 4: Simplify right side
    6,628.64x = 42,623,156.28
  5. Step 5: Solve for x
    x = 42,623,156.28/6,628.64
  6. Step 6: Final answer
    x = 6,430.15

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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.