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Finding the Fourth Proportional to 14,777.31, 20,389.90 and 8,809.54

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Solution

The fourth proportional to 14,777.31, 20,389.90 and 8,809.54 is: 12,155.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,777.31 : 20,389.90 = 8,809.54 : x
  2. Step 2: Convert to fraction form
    14,777.31/20,389.90 = 8,809.54/x
  3. Step 3: Cross multiply
    14,777.31x = 20,389.90 × 8,809.54
  4. Step 4: Simplify right side
    14,777.31x = 179,625,639.65
  5. Step 5: Solve for x
    x = 179,625,639.65/14,777.31
  6. Step 6: Final answer
    x = 12,155.50

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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.