Home / 20,558.31-28,371.78-11,602.55

Finding the Fourth Proportional to 20,558.31, 28,371.78 and 11,602.55

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Solution

The fourth proportional to 20,558.31, 28,371.78 and 11,602.55 is: 16,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.31 : 28,371.78 = 11,602.55 : x
  2. Step 2: Convert to fraction form
    20,558.31/28,371.78 = 11,602.55/x
  3. Step 3: Cross multiply
    20,558.31x = 28,371.78 × 11,602.55
  4. Step 4: Simplify right side
    20,558.31x = 329,184,854.18
  5. Step 5: Solve for x
    x = 329,184,854.18/20,558.31
  6. Step 6: Final answer
    x = 16,012.25

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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.