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Finding the Fourth Proportional to 6,320.64, 8,703.36 and 4,990.08

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Solution

The fourth proportional to 6,320.64, 8,703.36 and 4,990.08 is: 6,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,320.64 : 8,703.36 = 4,990.08 : x
  2. Step 2: Convert to fraction form
    6,320.64/8,703.36 = 4,990.08/x
  3. Step 3: Cross multiply
    6,320.64x = 8,703.36 × 4,990.08
  4. Step 4: Simplify right side
    6,320.64x = 43,430,462.67
  5. Step 5: Solve for x
    x = 43,430,462.67/6,320.64
  6. Step 6: Final answer
    x = 6,871.21

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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.