Home / 28,440.90-42,626.75-20,123.31

Finding the Fourth Proportional to 28,440.90, 42,626.75 and 20,123.31

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Solution

The fourth proportional to 28,440.90, 42,626.75 and 20,123.31 is: 30,160.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,440.90 : 42,626.75 = 20,123.31 : x
  2. Step 2: Convert to fraction form
    28,440.90/42,626.75 = 20,123.31/x
  3. Step 3: Cross multiply
    28,440.90x = 42,626.75 × 20,123.31
  4. Step 4: Simplify right side
    28,440.90x = 857,791,203.93
  5. Step 5: Solve for x
    x = 857,791,203.93/28,440.90
  6. Step 6: Final answer
    x = 30,160.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.