Home / 20,366.90-28,123.43-15,322.35

Finding the Fourth Proportional to 20,366.90, 28,123.43 and 15,322.35

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Solution

The fourth proportional to 20,366.90, 28,123.43 and 15,322.35 is: 21,157.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,366.90 : 28,123.43 = 15,322.35 : x
  2. Step 2: Convert to fraction form
    20,366.90/28,123.43 = 15,322.35/x
  3. Step 3: Cross multiply
    20,366.90x = 28,123.43 × 15,322.35
  4. Step 4: Simplify right side
    20,366.90x = 430,917,037.66
  5. Step 5: Solve for x
    x = 430,917,037.66/20,366.90
  6. Step 6: Final answer
    x = 21,157.71

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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.