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Finding the Fourth Proportional to 15,486.10, 21,372.24 and 8,772.01

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Solution

The fourth proportional to 15,486.10, 21,372.24 and 8,772.01 is: 12,106.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.10 : 21,372.24 = 8,772.01 : x
  2. Step 2: Convert to fraction form
    15,486.10/21,372.24 = 8,772.01/x
  3. Step 3: Cross multiply
    15,486.10x = 21,372.24 × 8,772.01
  4. Step 4: Simplify right side
    15,486.10x = 187,477,396.14
  5. Step 5: Solve for x
    x = 187,477,396.14/15,486.10
  6. Step 6: Final answer
    x = 12,106.18

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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.