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Finding the Fourth Proportional to 21,961.81, 32,809.21 and 14,000.90

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Solution

The fourth proportional to 21,961.81, 32,809.21 and 14,000.90 is: 20,916.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.81 : 32,809.21 = 14,000.90 : x
  2. Step 2: Convert to fraction form
    21,961.81/32,809.21 = 14,000.90/x
  3. Step 3: Cross multiply
    21,961.81x = 32,809.21 × 14,000.90
  4. Step 4: Simplify right side
    21,961.81x = 459,358,552.24
  5. Step 5: Solve for x
    x = 459,358,552.24/21,961.81
  6. Step 6: Final answer
    x = 20,916.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.