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Finding the Fourth Proportional to 8,489.61, 11,715.03 and 4,712.58

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Solution

The fourth proportional to 8,489.61, 11,715.03 and 4,712.58 is: 6,503.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.61 : 11,715.03 = 4,712.58 : x
  2. Step 2: Convert to fraction form
    8,489.61/11,715.03 = 4,712.58/x
  3. Step 3: Cross multiply
    8,489.61x = 11,715.03 × 4,712.58
  4. Step 4: Simplify right side
    8,489.61x = 55,208,016.08
  5. Step 5: Solve for x
    x = 55,208,016.08/8,489.61
  6. Step 6: Final answer
    x = 6,503.01

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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.