Home / 20,530.20-30,788.10-10,666.20

Finding the Fourth Proportional to 20,530.20, 30,788.10 and 10,666.20

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Solution

The fourth proportional to 20,530.20, 30,788.10 and 10,666.20 is: 15,995.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.20 : 30,788.10 = 10,666.20 : x
  2. Step 2: Convert to fraction form
    20,530.20/30,788.10 = 10,666.20/x
  3. Step 3: Cross multiply
    20,530.20x = 30,788.10 × 10,666.20
  4. Step 4: Simplify right side
    20,530.20x = 328,392,032.22
  5. Step 5: Solve for x
    x = 328,392,032.22/20,530.20
  6. Step 6: Final answer
    x = 15,995.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.