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Finding the Fourth Proportional to 18,712.19, 25,822.18 and 11,154.63

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Solution

The fourth proportional to 18,712.19, 25,822.18 and 11,154.63 is: 15,393.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.19 : 25,822.18 = 11,154.63 : x
  2. Step 2: Convert to fraction form
    18,712.19/25,822.18 = 11,154.63/x
  3. Step 3: Cross multiply
    18,712.19x = 25,822.18 × 11,154.63
  4. Step 4: Simplify right side
    18,712.19x = 288,036,863.69
  5. Step 5: Solve for x
    x = 288,036,863.69/18,712.19
  6. Step 6: Final answer
    x = 15,393.01

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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.