Home / 21,646.32-29,872.12-12,699.12

Finding the Fourth Proportional to 21,646.32, 29,872.12 and 12,699.12

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Solution

The fourth proportional to 21,646.32, 29,872.12 and 12,699.12 is: 17,524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,646.32 : 29,872.12 = 12,699.12 : x
  2. Step 2: Convert to fraction form
    21,646.32/29,872.12 = 12,699.12/x
  3. Step 3: Cross multiply
    21,646.32x = 29,872.12 × 12,699.12
  4. Step 4: Simplify right side
    21,646.32x = 379,349,636.53
  5. Step 5: Solve for x
    x = 379,349,636.53/21,646.32
  6. Step 6: Final answer
    x = 17,524.90

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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.