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Finding the Fourth Proportional to 18,411.76, 25,400.14 and 12,441.25

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Solution

The fourth proportional to 18,411.76, 25,400.14 and 12,441.25 is: 17,163.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.76 : 25,400.14 = 12,441.25 : x
  2. Step 2: Convert to fraction form
    18,411.76/25,400.14 = 12,441.25/x
  3. Step 3: Cross multiply
    18,411.76x = 25,400.14 × 12,441.25
  4. Step 4: Simplify right side
    18,411.76x = 316,009,491.78
  5. Step 5: Solve for x
    x = 316,009,491.78/18,411.76
  6. Step 6: Final answer
    x = 17,163.46

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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.