Home / 21,247.70-29,319.44-11,815.70

Finding the Fourth Proportional to 21,247.70, 29,319.44 and 11,815.70

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Solution

The fourth proportional to 21,247.70, 29,319.44 and 11,815.70 is: 16,304.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.70 : 29,319.44 = 11,815.70 : x
  2. Step 2: Convert to fraction form
    21,247.70/29,319.44 = 11,815.70/x
  3. Step 3: Cross multiply
    21,247.70x = 29,319.44 × 11,815.70
  4. Step 4: Simplify right side
    21,247.70x = 346,429,707.21
  5. Step 5: Solve for x
    x = 346,429,707.21/21,247.70
  6. Step 6: Final answer
    x = 16,304.34

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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.