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Finding the Fourth Proportional to 18,757.40, 25,886.78 and 10,802.20

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Solution

The fourth proportional to 18,757.40, 25,886.78 and 10,802.20 is: 14,907.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.40 : 25,886.78 = 10,802.20 : x
  2. Step 2: Convert to fraction form
    18,757.40/25,886.78 = 10,802.20/x
  3. Step 3: Cross multiply
    18,757.40x = 25,886.78 × 10,802.20
  4. Step 4: Simplify right side
    18,757.40x = 279,634,174.92
  5. Step 5: Solve for x
    x = 279,634,174.92/18,757.40
  6. Step 6: Final answer
    x = 14,907.94

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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.