Home / 51,439.95-70,990.43-28,781.55

Finding the Fourth Proportional to 51,439.95, 70,990.43 and 28,781.55

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Solution

The fourth proportional to 51,439.95, 70,990.43 and 28,781.55 is: 39,720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,439.95 : 70,990.43 = 28,781.55 : x
  2. Step 2: Convert to fraction form
    51,439.95/70,990.43 = 28,781.55/x
  3. Step 3: Cross multiply
    51,439.95x = 70,990.43 × 28,781.55
  4. Step 4: Simplify right side
    51,439.95x = 2,043,214,466.66
  5. Step 5: Solve for x
    x = 2,043,214,466.66/51,439.95
  6. Step 6: Final answer
    x = 39,720.38

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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.