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Finding the Fourth Proportional to 21,356.52, 29,472 and 11,925.12

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Solution

The fourth proportional to 21,356.52, 29,472 and 11,925.12 is: 16,456.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.52 : 29,472 = 11,925.12 : x
  2. Step 2: Convert to fraction form
    21,356.52/29,472 = 11,925.12/x
  3. Step 3: Cross multiply
    21,356.52x = 29,472 × 11,925.12
  4. Step 4: Simplify right side
    21,356.52x = 351,457,136.64
  5. Step 5: Solve for x
    x = 351,457,136.64/21,356.52
  6. Step 6: Final answer
    x = 16,456.67

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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.