Home / 30,676.40-42,360-29,101.76

Finding the Fourth Proportional to 30,676.40, 42,360 and 29,101.76

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Solution

The fourth proportional to 30,676.40, 42,360 and 29,101.76 is: 40,185.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,676.40 : 42,360 = 29,101.76 : x
  2. Step 2: Convert to fraction form
    30,676.40/42,360 = 29,101.76/x
  3. Step 3: Cross multiply
    30,676.40x = 42,360 × 29,101.76
  4. Step 4: Simplify right side
    30,676.40x = 1,232,750,553.60
  5. Step 5: Solve for x
    x = 1,232,750,553.60/30,676.40
  6. Step 6: Final answer
    x = 40,185.63

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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.