Home / 21,639.15-29,861.69-12,207.51

Finding the Fourth Proportional to 21,639.15, 29,861.69 and 12,207.51

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Solution

The fourth proportional to 21,639.15, 29,861.69 and 12,207.51 is: 16,846.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.15 : 29,861.69 = 12,207.51 : x
  2. Step 2: Convert to fraction form
    21,639.15/29,861.69 = 12,207.51/x
  3. Step 3: Cross multiply
    21,639.15x = 29,861.69 × 12,207.51
  4. Step 4: Simplify right side
    21,639.15x = 364,536,818.25
  5. Step 5: Solve for x
    x = 364,536,818.25/21,639.15
  6. Step 6: Final answer
    x = 16,846.17

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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.