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Finding the Fourth Proportional to 21,682.50, 29,921.85 and 11,746.50

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Solution

The fourth proportional to 21,682.50, 29,921.85 and 11,746.50 is: 16,210.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,682.50 : 29,921.85 = 11,746.50 : x
  2. Step 2: Convert to fraction form
    21,682.50/29,921.85 = 11,746.50/x
  3. Step 3: Cross multiply
    21,682.50x = 29,921.85 × 11,746.50
  4. Step 4: Simplify right side
    21,682.50x = 351,477,011.03
  5. Step 5: Solve for x
    x = 351,477,011.03/21,682.50
  6. Step 6: Final answer
    x = 16,210.17

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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.