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Finding the Fourth Proportional to 35,139.78, 48,491.73 and 20,984.22

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Solution

The fourth proportional to 35,139.78, 48,491.73 and 20,984.22 is: 28,957.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,139.78 : 48,491.73 = 20,984.22 : x
  2. Step 2: Convert to fraction form
    35,139.78/48,491.73 = 20,984.22/x
  3. Step 3: Cross multiply
    35,139.78x = 48,491.73 × 20,984.22
  4. Step 4: Simplify right side
    35,139.78x = 1,017,561,130.50
  5. Step 5: Solve for x
    x = 1,017,561,130.50/35,139.78
  6. Step 6: Final answer
    x = 28,957.53

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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.