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Finding the Fourth Proportional to 21,647.64, 29,873.72 and 11,711.64

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Solution

The fourth proportional to 21,647.64, 29,873.72 and 11,711.64 is: 16,162.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,647.64 : 29,873.72 = 11,711.64 : x
  2. Step 2: Convert to fraction form
    21,647.64/29,873.72 = 11,711.64/x
  3. Step 3: Cross multiply
    21,647.64x = 29,873.72 × 11,711.64
  4. Step 4: Simplify right side
    21,647.64x = 349,870,254.10
  5. Step 5: Solve for x
    x = 349,870,254.10/21,647.64
  6. Step 6: Final answer
    x = 16,162.05

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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.