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Finding the Fourth Proportional to 18,828.22, 25,978.77 and 10,868.74

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Solution

The fourth proportional to 18,828.22, 25,978.77 and 10,868.74 is: 14,996.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,828.22 : 25,978.77 = 10,868.74 : x
  2. Step 2: Convert to fraction form
    18,828.22/25,978.77 = 10,868.74/x
  3. Step 3: Cross multiply
    18,828.22x = 25,978.77 × 10,868.74
  4. Step 4: Simplify right side
    18,828.22x = 282,356,496.65
  5. Step 5: Solve for x
    x = 282,356,496.65/18,828.22
  6. Step 6: Final answer
    x = 14,996.45

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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.