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Finding the Fourth Proportional to 20,913.03, 28,860.03 and 11,482.20

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Solution

The fourth proportional to 20,913.03, 28,860.03 and 11,482.20 is: 15,845.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.03 : 28,860.03 = 11,482.20 : x
  2. Step 2: Convert to fraction form
    20,913.03/28,860.03 = 11,482.20/x
  3. Step 3: Cross multiply
    20,913.03x = 28,860.03 × 11,482.20
  4. Step 4: Simplify right side
    20,913.03x = 331,376,636.47
  5. Step 5: Solve for x
    x = 331,376,636.47/20,913.03
  6. Step 6: Final answer
    x = 15,845.46

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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.