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Finding the Fourth Proportional to 15,203.70, 20,900.57 and 13,071.38

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Solution

The fourth proportional to 15,203.70, 20,900.57 and 13,071.38 is: 17,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.70 : 20,900.57 = 13,071.38 : x
  2. Step 2: Convert to fraction form
    15,203.70/20,900.57 = 13,071.38/x
  3. Step 3: Cross multiply
    15,203.70x = 20,900.57 × 13,071.38
  4. Step 4: Simplify right side
    15,203.70x = 273,199,122.83
  5. Step 5: Solve for x
    x = 273,199,122.83/15,203.70
  6. Step 6: Final answer
    x = 17,969.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.