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Finding the Fourth Proportional to 18,852.32, 26,018.88 and 10,899.20

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Solution

The fourth proportional to 18,852.32, 26,018.88 and 10,899.20 is: 15,042.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,852.32 : 26,018.88 = 10,899.20 : x
  2. Step 2: Convert to fraction form
    18,852.32/26,018.88 = 10,899.20/x
  3. Step 3: Cross multiply
    18,852.32x = 26,018.88 × 10,899.20
  4. Step 4: Simplify right side
    18,852.32x = 283,584,976.90
  5. Step 5: Solve for x
    x = 283,584,976.90/18,852.32
  6. Step 6: Final answer
    x = 15,042.44

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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.