Home / 9,639.72-13,302.54-5,390.79

Finding the Fourth Proportional to 9,639.72, 13,302.54 and 5,390.79

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Solution

The fourth proportional to 9,639.72, 13,302.54 and 5,390.79 is: 7,439.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,639.72 : 13,302.54 = 5,390.79 : x
  2. Step 2: Convert to fraction form
    9,639.72/13,302.54 = 5,390.79/x
  3. Step 3: Cross multiply
    9,639.72x = 13,302.54 × 5,390.79
  4. Step 4: Simplify right side
    9,639.72x = 71,711,199.61
  5. Step 5: Solve for x
    x = 71,711,199.61/9,639.72
  6. Step 6: Final answer
    x = 7,439.14

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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.