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Finding the Fourth Proportional to 6,490.40, 8,961.48 and 5,070.56

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Solution

The fourth proportional to 6,490.40, 8,961.48 and 5,070.56 is: 7,001.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.40 : 8,961.48 = 5,070.56 : x
  2. Step 2: Convert to fraction form
    6,490.40/8,961.48 = 5,070.56/x
  3. Step 3: Cross multiply
    6,490.40x = 8,961.48 × 5,070.56
  4. Step 4: Simplify right side
    6,490.40x = 45,439,722.03
  5. Step 5: Solve for x
    x = 45,439,722.03/6,490.40
  6. Step 6: Final answer
    x = 7,001.07

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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.