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Finding the Fourth Proportional to 15,661.61, 21,612.84 and 8,588.03

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Solution

The fourth proportional to 15,661.61, 21,612.84 and 8,588.03 is: 11,851.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.61 : 21,612.84 = 8,588.03 : x
  2. Step 2: Convert to fraction form
    15,661.61/21,612.84 = 8,588.03/x
  3. Step 3: Cross multiply
    15,661.61x = 21,612.84 × 8,588.03
  4. Step 4: Simplify right side
    15,661.61x = 185,611,718.31
  5. Step 5: Solve for x
    x = 185,611,718.31/15,661.61
  6. Step 6: Final answer
    x = 11,851.38

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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.