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Finding the Fourth Proportional to 15,625.76, 21,563.81 and 8,820.14

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Solution

The fourth proportional to 15,625.76, 21,563.81 and 8,820.14 is: 12,171.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,625.76 : 21,563.81 = 8,820.14 : x
  2. Step 2: Convert to fraction form
    15,625.76/21,563.81 = 8,820.14/x
  3. Step 3: Cross multiply
    15,625.76x = 21,563.81 × 8,820.14
  4. Step 4: Simplify right side
    15,625.76x = 190,195,671.21
  5. Step 5: Solve for x
    x = 190,195,671.21/15,625.76
  6. Step 6: Final answer
    x = 12,171.93

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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.