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Finding the Fourth Proportional to 18,411.84, 25,408.40 and 10,028.32

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Solution

The fourth proportional to 18,411.84, 25,408.40 and 10,028.32 is: 13,839.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.84 : 25,408.40 = 10,028.32 : x
  2. Step 2: Convert to fraction form
    18,411.84/25,408.40 = 10,028.32/x
  3. Step 3: Cross multiply
    18,411.84x = 25,408.40 × 10,028.32
  4. Step 4: Simplify right side
    18,411.84x = 254,803,565.89
  5. Step 5: Solve for x
    x = 254,803,565.89/18,411.84
  6. Step 6: Final answer
    x = 13,839.11

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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.