Home / 20,994.08-28,980.96-15,959.20

Finding the Fourth Proportional to 20,994.08, 28,980.96 and 15,959.20

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Solution

The fourth proportional to 20,994.08, 28,980.96 and 15,959.20 is: 22,030.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.08 : 28,980.96 = 15,959.20 : x
  2. Step 2: Convert to fraction form
    20,994.08/28,980.96 = 15,959.20/x
  3. Step 3: Cross multiply
    20,994.08x = 28,980.96 × 15,959.20
  4. Step 4: Simplify right side
    20,994.08x = 462,512,936.83
  5. Step 5: Solve for x
    x = 462,512,936.83/20,994.08
  6. Step 6: Final answer
    x = 22,030.64

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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.