Home / 28,006.52-38,651.72-20,920.64

Finding the Fourth Proportional to 28,006.52, 38,651.72 and 20,920.64

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Solution

The fourth proportional to 28,006.52, 38,651.72 and 20,920.64 is: 28,872.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,006.52 : 38,651.72 = 20,920.64 : x
  2. Step 2: Convert to fraction form
    28,006.52/38,651.72 = 20,920.64/x
  3. Step 3: Cross multiply
    28,006.52x = 38,651.72 × 20,920.64
  4. Step 4: Simplify right side
    28,006.52x = 808,618,421.64
  5. Step 5: Solve for x
    x = 808,618,421.64/28,006.52
  6. Step 6: Final answer
    x = 28,872.51

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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.