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Finding the Fourth Proportional to 14,515.79, 20,032.01 and 8,143.79

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Solution

The fourth proportional to 14,515.79, 20,032.01 and 8,143.79 is: 11,238.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,515.79 : 20,032.01 = 8,143.79 : x
  2. Step 2: Convert to fraction form
    14,515.79/20,032.01 = 8,143.79/x
  3. Step 3: Cross multiply
    14,515.79x = 20,032.01 × 8,143.79
  4. Step 4: Simplify right side
    14,515.79x = 163,136,485.06
  5. Step 5: Solve for x
    x = 163,136,485.06/14,515.79
  6. Step 6: Final answer
    x = 11,238.55

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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.