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Finding the Fourth Proportional to 15,656.68, 21,605.97 and 8,583.15

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Solution

The fourth proportional to 15,656.68, 21,605.97 and 8,583.15 is: 11,844.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,656.68 : 21,605.97 = 8,583.15 : x
  2. Step 2: Convert to fraction form
    15,656.68/21,605.97 = 8,583.15/x
  3. Step 3: Cross multiply
    15,656.68x = 21,605.97 × 8,583.15
  4. Step 4: Simplify right side
    15,656.68x = 185,447,281.41
  5. Step 5: Solve for x
    x = 185,447,281.41/15,656.68
  6. Step 6: Final answer
    x = 11,844.61

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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.