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Finding the Fourth Proportional to 20,802.54, 31,173.92 and 8,953.08

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Solution

The fourth proportional to 20,802.54, 31,173.92 and 8,953.08 is: 13,416.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.54 : 31,173.92 = 8,953.08 : x
  2. Step 2: Convert to fraction form
    20,802.54/31,173.92 = 8,953.08/x
  3. Step 3: Cross multiply
    20,802.54x = 31,173.92 × 8,953.08
  4. Step 4: Simplify right side
    20,802.54x = 279,102,554.91
  5. Step 5: Solve for x
    x = 279,102,554.91/20,802.54
  6. Step 6: Final answer
    x = 13,416.75

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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.