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Finding the Fourth Proportional to 15,657.71, 21,607.61 and 8,584.58

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Solution

The fourth proportional to 15,657.71, 21,607.61 and 8,584.58 is: 11,846.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,657.71 : 21,607.61 = 8,584.58 : x
  2. Step 2: Convert to fraction form
    15,657.71/21,607.61 = 8,584.58/x
  3. Step 3: Cross multiply
    15,657.71x = 21,607.61 × 8,584.58
  4. Step 4: Simplify right side
    15,657.71x = 185,492,267.75
  5. Step 5: Solve for x
    x = 185,492,267.75/15,657.71
  6. Step 6: Final answer
    x = 11,846.71

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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.