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Finding the Fourth Proportional to 14,583.69, 21,857.18 and 7,920.09

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Solution

The fourth proportional to 14,583.69, 21,857.18 and 7,920.09 is: 11,870.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,583.69 : 21,857.18 = 7,920.09 : x
  2. Step 2: Convert to fraction form
    14,583.69/21,857.18 = 7,920.09/x
  3. Step 3: Cross multiply
    14,583.69x = 21,857.18 × 7,920.09
  4. Step 4: Simplify right side
    14,583.69x = 173,110,793.15
  5. Step 5: Solve for x
    x = 173,110,793.15/14,583.69
  6. Step 6: Final answer
    x = 11,870.16

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1.5x scale

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.