Home / 38,142.72-52,638.20-21,148.55

Finding the Fourth Proportional to 38,142.72, 52,638.20 and 21,148.55

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Solution

The fourth proportional to 38,142.72, 52,638.20 and 21,148.55 is: 29,185.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,142.72 : 52,638.20 = 21,148.55 : x
  2. Step 2: Convert to fraction form
    38,142.72/52,638.20 = 21,148.55/x
  3. Step 3: Cross multiply
    38,142.72x = 52,638.20 × 21,148.55
  4. Step 4: Simplify right side
    38,142.72x = 1,113,221,394.29
  5. Step 5: Solve for x
    x = 1,113,221,394.29/38,142.72
  6. Step 6: Final answer
    x = 29,185.68

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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.