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Finding the Fourth Proportional to 18,756.74, 25,883.34 and 10,257.21

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Solution

The fourth proportional to 18,756.74, 25,883.34 and 10,257.21 is: 14,154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.74 : 25,883.34 = 10,257.21 : x
  2. Step 2: Convert to fraction form
    18,756.74/25,883.34 = 10,257.21/x
  3. Step 3: Cross multiply
    18,756.74x = 25,883.34 × 10,257.21
  4. Step 4: Simplify right side
    18,756.74x = 265,490,802.60
  5. Step 5: Solve for x
    x = 265,490,802.60/18,756.74
  6. Step 6: Final answer
    x = 14,154.42

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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.