Home / 30,854.82-42,579.36-18,108.12

Finding the Fourth Proportional to 30,854.82, 42,579.36 and 18,108.12

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Solution

The fourth proportional to 30,854.82, 42,579.36 and 18,108.12 is: 24,989.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,854.82 : 42,579.36 = 18,108.12 : x
  2. Step 2: Convert to fraction form
    30,854.82/42,579.36 = 18,108.12/x
  3. Step 3: Cross multiply
    30,854.82x = 42,579.36 × 18,108.12
  4. Step 4: Simplify right side
    30,854.82x = 771,032,160.40
  5. Step 5: Solve for x
    x = 771,032,160.40/30,854.82
  6. Step 6: Final answer
    x = 24,989.03

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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.