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Finding the Fourth Proportional to 18,751.40, 25,878.50 and 10,796.20

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Solution

The fourth proportional to 18,751.40, 25,878.50 and 10,796.20 is: 14,899.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.40 : 25,878.50 = 10,796.20 : x
  2. Step 2: Convert to fraction form
    18,751.40/25,878.50 = 10,796.20/x
  3. Step 3: Cross multiply
    18,751.40x = 25,878.50 × 10,796.20
  4. Step 4: Simplify right side
    18,751.40x = 279,389,461.70
  5. Step 5: Solve for x
    x = 279,389,461.70/18,751.40
  6. Step 6: Final answer
    x = 14,899.66

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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.