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Finding the Fourth Proportional to 14,808.78, 20,434.95 and 8,521.56

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Solution

The fourth proportional to 14,808.78, 20,434.95 and 8,521.56 is: 11,759.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,808.78 : 20,434.95 = 8,521.56 : x
  2. Step 2: Convert to fraction form
    14,808.78/20,434.95 = 8,521.56/x
  3. Step 3: Cross multiply
    14,808.78x = 20,434.95 × 8,521.56
  4. Step 4: Simplify right side
    14,808.78x = 174,137,652.52
  5. Step 5: Solve for x
    x = 174,137,652.52/14,808.78
  6. Step 6: Final answer
    x = 11,759.08

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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.