Home / 30,153.42-45,461.52-28,120.68

Finding the Fourth Proportional to 30,153.42, 45,461.52 and 28,120.68

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Solution

The fourth proportional to 30,153.42, 45,461.52 and 28,120.68 is: 42,396.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,153.42 : 45,461.52 = 28,120.68 : x
  2. Step 2: Convert to fraction form
    30,153.42/45,461.52 = 28,120.68/x
  3. Step 3: Cross multiply
    30,153.42x = 45,461.52 × 28,120.68
  4. Step 4: Simplify right side
    30,153.42x = 1,278,408,856.23
  5. Step 5: Solve for x
    x = 1,278,408,856.23/30,153.42
  6. Step 6: Final answer
    x = 42,396.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.