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Finding the Fourth Proportional to 21,808.74, 32,713.24 and 20,746.28

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Solution

The fourth proportional to 21,808.74, 32,713.24 and 20,746.28 is: 31,119.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,808.74 : 32,713.24 = 20,746.28 : x
  2. Step 2: Convert to fraction form
    21,808.74/32,713.24 = 20,746.28/x
  3. Step 3: Cross multiply
    21,808.74x = 32,713.24 × 20,746.28
  4. Step 4: Simplify right side
    21,808.74x = 678,678,036.75
  5. Step 5: Solve for x
    x = 678,678,036.75/21,808.74
  6. Step 6: Final answer
    x = 31,119.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.