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Finding the Fourth Proportional to 18,143.43, 27,209.88 and 7,047.51

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Solution

The fourth proportional to 18,143.43, 27,209.88 and 7,047.51 is: 10,569.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,143.43 : 27,209.88 = 7,047.51 : x
  2. Step 2: Convert to fraction form
    18,143.43/27,209.88 = 7,047.51/x
  3. Step 3: Cross multiply
    18,143.43x = 27,209.88 × 7,047.51
  4. Step 4: Simplify right side
    18,143.43x = 191,761,901.40
  5. Step 5: Solve for x
    x = 191,761,901.40/18,143.43
  6. Step 6: Final answer
    x = 10,569.22

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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.