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Finding the Fourth Proportional to 38,603.70, 57,905.55 and 13,643.55

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Solution

The fourth proportional to 38,603.70, 57,905.55 and 13,643.55 is: 20,465.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,603.70 : 57,905.55 = 13,643.55 : x
  2. Step 2: Convert to fraction form
    38,603.70/57,905.55 = 13,643.55/x
  3. Step 3: Cross multiply
    38,603.70x = 57,905.55 × 13,643.55
  4. Step 4: Simplify right side
    38,603.70x = 790,037,266.70
  5. Step 5: Solve for x
    x = 790,037,266.70/38,603.70
  6. Step 6: Final answer
    x = 20,465.33

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Similar ratio
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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.