Home / 20,993.04-28,946.36-15,678.88

Finding the Fourth Proportional to 20,993.04, 28,946.36 and 15,678.88

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Solution

The fourth proportional to 20,993.04, 28,946.36 and 15,678.88 is: 21,618.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.04 : 28,946.36 = 15,678.88 : x
  2. Step 2: Convert to fraction form
    20,993.04/28,946.36 = 15,678.88/x
  3. Step 3: Cross multiply
    20,993.04x = 28,946.36 × 15,678.88
  4. Step 4: Simplify right side
    20,993.04x = 453,846,504.88
  5. Step 5: Solve for x
    x = 453,846,504.88/20,993.04
  6. Step 6: Final answer
    x = 21,618.90

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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.