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Finding the Fourth Proportional to 21,588.57, 29,792.07 and 12,157.11

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Solution

The fourth proportional to 21,588.57, 29,792.07 and 12,157.11 is: 16,776.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,588.57 : 29,792.07 = 12,157.11 : x
  2. Step 2: Convert to fraction form
    21,588.57/29,792.07 = 12,157.11/x
  3. Step 3: Cross multiply
    21,588.57x = 29,792.07 × 12,157.11
  4. Step 4: Simplify right side
    21,588.57x = 362,185,472.12
  5. Step 5: Solve for x
    x = 362,185,472.12/21,588.57
  6. Step 6: Final answer
    x = 16,776.72

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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.