Home / 30,989.31-42,765.53-18,411.63

Finding the Fourth Proportional to 30,989.31, 42,765.53 and 18,411.63

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Solution

The fourth proportional to 30,989.31, 42,765.53 and 18,411.63 is: 25,408.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,989.31 : 42,765.53 = 18,411.63 : x
  2. Step 2: Convert to fraction form
    30,989.31/42,765.53 = 18,411.63/x
  3. Step 3: Cross multiply
    30,989.31x = 42,765.53 × 18,411.63
  4. Step 4: Simplify right side
    30,989.31x = 787,383,115.11
  5. Step 5: Solve for x
    x = 787,383,115.11/30,989.31
  6. Step 6: Final answer
    x = 25,408.22

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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.