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Finding the Fourth Proportional to 21,363.57, 29,482.13 and 11,803.99

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Solution

The fourth proportional to 21,363.57, 29,482.13 and 11,803.99 is: 16,289.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,363.57 : 29,482.13 = 11,803.99 : x
  2. Step 2: Convert to fraction form
    21,363.57/29,482.13 = 11,803.99/x
  3. Step 3: Cross multiply
    21,363.57x = 29,482.13 × 11,803.99
  4. Step 4: Simplify right side
    21,363.57x = 348,006,753.84
  5. Step 5: Solve for x
    x = 348,006,753.84/21,363.57
  6. Step 6: Final answer
    x = 16,289.73

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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.