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Finding the Fourth Proportional to 17,878.99, 24,672.58 and 9,921.01

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Solution

The fourth proportional to 17,878.99, 24,672.58 and 9,921.01 is: 13,690.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,878.99 : 24,672.58 = 9,921.01 : x
  2. Step 2: Convert to fraction form
    17,878.99/24,672.58 = 9,921.01/x
  3. Step 3: Cross multiply
    17,878.99x = 24,672.58 × 9,921.01
  4. Step 4: Simplify right side
    17,878.99x = 244,776,912.91
  5. Step 5: Solve for x
    x = 244,776,912.91/17,878.99
  6. Step 6: Final answer
    x = 13,690.76

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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.