Home / 20,648.64-28,499.66-13,575.72

Finding the Fourth Proportional to 20,648.64, 28,499.66 and 13,575.72

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Solution

The fourth proportional to 20,648.64, 28,499.66 and 13,575.72 is: 18,737.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.64 : 28,499.66 = 13,575.72 : x
  2. Step 2: Convert to fraction form
    20,648.64/28,499.66 = 13,575.72/x
  3. Step 3: Cross multiply
    20,648.64x = 28,499.66 × 13,575.72
  4. Step 4: Simplify right side
    20,648.64x = 386,903,570.52
  5. Step 5: Solve for x
    x = 386,903,570.52/20,648.64
  6. Step 6: Final answer
    x = 18,737.48

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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.