Home / 20,557.10-28,368.77-11,125.64

Finding the Fourth Proportional to 20,557.10, 28,368.77 and 11,125.64

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Solution

The fourth proportional to 20,557.10, 28,368.77 and 11,125.64 is: 15,353.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.10 : 28,368.77 = 11,125.64 : x
  2. Step 2: Convert to fraction form
    20,557.10/28,368.77 = 11,125.64/x
  3. Step 3: Cross multiply
    20,557.10x = 28,368.77 × 11,125.64
  4. Step 4: Simplify right side
    20,557.10x = 315,620,524.79
  5. Step 5: Solve for x
    x = 315,620,524.79/20,557.10
  6. Step 6: Final answer
    x = 15,353.36

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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.