Home / 30,627.78-42,135.12-29,315.58

Finding the Fourth Proportional to 30,627.78, 42,135.12 and 29,315.58

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Solution

The fourth proportional to 30,627.78, 42,135.12 and 29,315.58 is: 40,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,627.78 : 42,135.12 = 29,315.58 : x
  2. Step 2: Convert to fraction form
    30,627.78/42,135.12 = 29,315.58/x
  3. Step 3: Cross multiply
    30,627.78x = 42,135.12 × 29,315.58
  4. Step 4: Simplify right side
    30,627.78x = 1,235,215,334.59
  5. Step 5: Solve for x
    x = 1,235,215,334.59/30,627.78
  6. Step 6: Final answer
    x = 40,329.90

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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.