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Finding the Fourth Proportional to 14,091.17, 19,440.81 and 8,421.98

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Solution

The fourth proportional to 14,091.17, 19,440.81 and 8,421.98 is: 11,619.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,091.17 : 19,440.81 = 8,421.98 : x
  2. Step 2: Convert to fraction form
    14,091.17/19,440.81 = 8,421.98/x
  3. Step 3: Cross multiply
    14,091.17x = 19,440.81 × 8,421.98
  4. Step 4: Simplify right side
    14,091.17x = 163,730,015.80
  5. Step 5: Solve for x
    x = 163,730,015.80/14,091.17
  6. Step 6: Final answer
    x = 11,619.34

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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.