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Finding the Fourth Proportional to 18,990, 26,206.20 and 10,606.68

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Solution

The fourth proportional to 18,990, 26,206.20 and 10,606.68 is: 14,637.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990 : 26,206.20 = 10,606.68 : x
  2. Step 2: Convert to fraction form
    18,990/26,206.20 = 10,606.68/x
  3. Step 3: Cross multiply
    18,990x = 26,206.20 × 10,606.68
  4. Step 4: Simplify right side
    18,990x = 277,960,777.42
  5. Step 5: Solve for x
    x = 277,960,777.42/18,990
  6. Step 6: Final answer
    x = 14,637.22

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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.