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Finding the Fourth Proportional to 21,210.85, 29,267.71 and 12,256.62

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Solution

The fourth proportional to 21,210.85, 29,267.71 and 12,256.62 is: 16,912.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.85 : 29,267.71 = 12,256.62 : x
  2. Step 2: Convert to fraction form
    21,210.85/29,267.71 = 12,256.62/x
  3. Step 3: Cross multiply
    21,210.85x = 29,267.71 × 12,256.62
  4. Step 4: Simplify right side
    21,210.85x = 358,723,199.74
  5. Step 5: Solve for x
    x = 358,723,199.74/21,210.85
  6. Step 6: Final answer
    x = 16,912.25

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.