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Finding the Fourth Proportional to 14,478.98, 19,981.20 and 8,813.96

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Solution

The fourth proportional to 14,478.98, 19,981.20 and 8,813.96 is: 12,163.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,478.98 : 19,981.20 = 8,813.96 : x
  2. Step 2: Convert to fraction form
    14,478.98/19,981.20 = 8,813.96/x
  3. Step 3: Cross multiply
    14,478.98x = 19,981.20 × 8,813.96
  4. Step 4: Simplify right side
    14,478.98x = 176,113,505.63
  5. Step 5: Solve for x
    x = 176,113,505.63/14,478.98
  6. Step 6: Final answer
    x = 12,163.40

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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.