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Finding the Fourth Proportional to 18,802.51, 25,949.87 and 12,347.71

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Solution

The fourth proportional to 18,802.51, 25,949.87 and 12,347.71 is: 17,041.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.51 : 25,949.87 = 12,347.71 : x
  2. Step 2: Convert to fraction form
    18,802.51/25,949.87 = 12,347.71/x
  3. Step 3: Cross multiply
    18,802.51x = 25,949.87 × 12,347.71
  4. Step 4: Simplify right side
    18,802.51x = 320,421,469.30
  5. Step 5: Solve for x
    x = 320,421,469.30/18,802.51
  6. Step 6: Final answer
    x = 17,041.42

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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.