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Finding the Fourth Proportional to 6,870.56, 9,521.30 and 6,739.28

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Solution

The fourth proportional to 6,870.56, 9,521.30 and 6,739.28 is: 9,339.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,870.56 : 9,521.30 = 6,739.28 : x
  2. Step 2: Convert to fraction form
    6,870.56/9,521.30 = 6,739.28/x
  3. Step 3: Cross multiply
    6,870.56x = 9,521.30 × 6,739.28
  4. Step 4: Simplify right side
    6,870.56x = 64,166,706.66
  5. Step 5: Solve for x
    x = 64,166,706.66/6,870.56
  6. Step 6: Final answer
    x = 9,339.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.