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Finding the Fourth Proportional to 7,002.80, 9,663.36 and 4,018.40

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Solution

The fourth proportional to 7,002.80, 9,663.36 and 4,018.40 is: 5,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,002.80 : 9,663.36 = 4,018.40 : x
  2. Step 2: Convert to fraction form
    7,002.80/9,663.36 = 4,018.40/x
  3. Step 3: Cross multiply
    7,002.80x = 9,663.36 × 4,018.40
  4. Step 4: Simplify right side
    7,002.80x = 38,831,245.82
  5. Step 5: Solve for x
    x = 38,831,245.82/7,002.80
  6. Step 6: Final answer
    x = 5,545.10

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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.