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Finding the Fourth Proportional to 8,438.79, 11,646.52 and 7,019.97

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Solution

The fourth proportional to 8,438.79, 11,646.52 and 7,019.97 is: 9,688.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,438.79 : 11,646.52 = 7,019.97 : x
  2. Step 2: Convert to fraction form
    8,438.79/11,646.52 = 7,019.97/x
  3. Step 3: Cross multiply
    8,438.79x = 11,646.52 × 7,019.97
  4. Step 4: Simplify right side
    8,438.79x = 81,758,221.00
  5. Step 5: Solve for x
    x = 81,758,221.00/8,438.79
  6. Step 6: Final answer
    x = 9,688.38

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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.