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Finding the Fourth Proportional to 21,774.99, 30,061.80 and 16,660.89

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Solution

The fourth proportional to 21,774.99, 30,061.80 and 16,660.89 is: 23,001.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,774.99 : 30,061.80 = 16,660.89 : x
  2. Step 2: Convert to fraction form
    21,774.99/30,061.80 = 16,660.89/x
  3. Step 3: Cross multiply
    21,774.99x = 30,061.80 × 16,660.89
  4. Step 4: Simplify right side
    21,774.99x = 500,856,343.00
  5. Step 5: Solve for x
    x = 500,856,343.00/21,774.99
  6. Step 6: Final answer
    x = 23,001.45

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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.