Home / 20,366.78-28,123.26-15,322.23

Finding the Fourth Proportional to 20,366.78, 28,123.26 and 15,322.23

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Solution

The fourth proportional to 20,366.78, 28,123.26 and 15,322.23 is: 21,157.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,366.78 : 28,123.26 = 15,322.23 : x
  2. Step 2: Convert to fraction form
    20,366.78/28,123.26 = 15,322.23/x
  3. Step 3: Cross multiply
    20,366.78x = 28,123.26 × 15,322.23
  4. Step 4: Simplify right side
    20,366.78x = 430,911,058.07
  5. Step 5: Solve for x
    x = 430,911,058.07/20,366.78
  6. Step 6: Final answer
    x = 21,157.55

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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.