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Finding the Fourth Proportional to 14,859.79, 20,506.38 and 8,145.39

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Solution

The fourth proportional to 14,859.79, 20,506.38 and 8,145.39 is: 11,240.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,859.79 : 20,506.38 = 8,145.39 : x
  2. Step 2: Convert to fraction form
    14,859.79/20,506.38 = 8,145.39/x
  3. Step 3: Cross multiply
    14,859.79x = 20,506.38 × 8,145.39
  4. Step 4: Simplify right side
    14,859.79x = 167,032,508.94
  5. Step 5: Solve for x
    x = 167,032,508.94/14,859.79
  6. Step 6: Final answer
    x = 11,240.57

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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.