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Finding the Fourth Proportional to 14,774.66, 20,389.20 and 8,809.76

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Solution

The fourth proportional to 14,774.66, 20,389.20 and 8,809.76 is: 12,157.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,774.66 : 20,389.20 = 8,809.76 : x
  2. Step 2: Convert to fraction form
    14,774.66/20,389.20 = 8,809.76/x
  3. Step 3: Cross multiply
    14,774.66x = 20,389.20 × 8,809.76
  4. Step 4: Simplify right side
    14,774.66x = 179,623,856.65
  5. Step 5: Solve for x
    x = 179,623,856.65/14,774.66
  6. Step 6: Final answer
    x = 12,157.57

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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.