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Finding the Fourth Proportional to 18,681.89, 25,780.64 and 10,184.04

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Solution

The fourth proportional to 18,681.89, 25,780.64 and 10,184.04 is: 14,053.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.89 : 25,780.64 = 10,184.04 : x
  2. Step 2: Convert to fraction form
    18,681.89/25,780.64 = 10,184.04/x
  3. Step 3: Cross multiply
    18,681.89x = 25,780.64 × 10,184.04
  4. Step 4: Simplify right side
    18,681.89x = 262,551,018.07
  5. Step 5: Solve for x
    x = 262,551,018.07/18,681.89
  6. Step 6: Final answer
    x = 14,053.78

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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.