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Finding the Fourth Proportional to 7,014.40, 10,521.60 and 6,899.20

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Solution

The fourth proportional to 7,014.40, 10,521.60 and 6,899.20 is: 10,348.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,014.40 : 10,521.60 = 6,899.20 : x
  2. Step 2: Convert to fraction form
    7,014.40/10,521.60 = 6,899.20/x
  3. Step 3: Cross multiply
    7,014.40x = 10,521.60 × 6,899.20
  4. Step 4: Simplify right side
    7,014.40x = 72,590,622.72
  5. Step 5: Solve for x
    x = 72,590,622.72/7,014.40
  6. Step 6: Final answer
    x = 10,348.80

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Similar ratio
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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.