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Finding the Fourth Proportional to 7,215.60, 10,800.70 and 7,047.12

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Solution

The fourth proportional to 7,215.60, 10,800.70 and 7,047.12 is: 10,548.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.60 : 10,800.70 = 7,047.12 : x
  2. Step 2: Convert to fraction form
    7,215.60/10,800.70 = 7,047.12/x
  3. Step 3: Cross multiply
    7,215.60x = 10,800.70 × 7,047.12
  4. Step 4: Simplify right side
    7,215.60x = 76,113,828.98
  5. Step 5: Solve for x
    x = 76,113,828.98/7,215.60
  6. Step 6: Final answer
    x = 10,548.51

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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.