Home / 30,348.78-41,861.76-20,139.58

Finding the Fourth Proportional to 30,348.78, 41,861.76 and 20,139.58

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Solution

The fourth proportional to 30,348.78, 41,861.76 and 20,139.58 is: 27,779.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,348.78 : 41,861.76 = 20,139.58 : x
  2. Step 2: Convert to fraction form
    30,348.78/41,861.76 = 20,139.58/x
  3. Step 3: Cross multiply
    30,348.78x = 41,861.76 × 20,139.58
  4. Step 4: Simplify right side
    30,348.78x = 843,078,264.46
  5. Step 5: Solve for x
    x = 843,078,264.46/30,348.78
  6. Step 6: Final answer
    x = 27,779.64

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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.