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Finding the Fourth Proportional to 7,215.77, 9,957.90 and 4,233.76

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Solution

The fourth proportional to 7,215.77, 9,957.90 and 4,233.76 is: 5,842.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.77 : 9,957.90 = 4,233.76 : x
  2. Step 2: Convert to fraction form
    7,215.77/9,957.90 = 4,233.76/x
  3. Step 3: Cross multiply
    7,215.77x = 9,957.90 × 4,233.76
  4. Step 4: Simplify right side
    7,215.77x = 42,159,287.75
  5. Step 5: Solve for x
    x = 42,159,287.75/7,215.77
  6. Step 6: Final answer
    x = 5,842.66

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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.