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Finding the Fourth Proportional to 20,620.08, 28,482.84 and 15,810.84

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Solution

The fourth proportional to 20,620.08, 28,482.84 and 15,810.84 is: 21,839.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.08 : 28,482.84 = 15,810.84 : x
  2. Step 2: Convert to fraction form
    20,620.08/28,482.84 = 15,810.84/x
  3. Step 3: Cross multiply
    20,620.08x = 28,482.84 × 15,810.84
  4. Step 4: Simplify right side
    20,620.08x = 450,337,625.99
  5. Step 5: Solve for x
    x = 450,337,625.99/20,620.08
  6. Step 6: Final answer
    x = 21,839.76

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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.