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Finding the Fourth Proportional to 15,235.62, 21,025 and 8,521.16

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Solution

The fourth proportional to 15,235.62, 21,025 and 8,521.16 is: 11,759.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,235.62 : 21,025 = 8,521.16 : x
  2. Step 2: Convert to fraction form
    15,235.62/21,025 = 8,521.16/x
  3. Step 3: Cross multiply
    15,235.62x = 21,025 × 8,521.16
  4. Step 4: Simplify right side
    15,235.62x = 179,157,389
  5. Step 5: Solve for x
    x = 179,157,389/15,235.62
  6. Step 6: Final answer
    x = 11,759.11

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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.