Home / 20,753.81-28,638.05-11,679.02

Finding the Fourth Proportional to 20,753.81, 28,638.05 and 11,679.02

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Solution

The fourth proportional to 20,753.81, 28,638.05 and 11,679.02 is: 16,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.81 : 28,638.05 = 11,679.02 : x
  2. Step 2: Convert to fraction form
    20,753.81/28,638.05 = 11,679.02/x
  3. Step 3: Cross multiply
    20,753.81x = 28,638.05 × 11,679.02
  4. Step 4: Simplify right side
    20,753.81x = 334,464,330.21
  5. Step 5: Solve for x
    x = 334,464,330.21/20,753.81
  6. Step 6: Final answer
    x = 16,115.80

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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.