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Finding the Fourth Proportional to 19,113.66, 28,661.13 and 5,965.98

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Solution

The fourth proportional to 19,113.66, 28,661.13 and 5,965.98 is: 8,946.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,113.66 : 28,661.13 = 5,965.98 : x
  2. Step 2: Convert to fraction form
    19,113.66/28,661.13 = 5,965.98/x
  3. Step 3: Cross multiply
    19,113.66x = 28,661.13 × 5,965.98
  4. Step 4: Simplify right side
    19,113.66x = 170,991,728.36
  5. Step 5: Solve for x
    x = 170,991,728.36/19,113.66
  6. Step 6: Final answer
    x = 8,946.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.