Home / 20,478.05-30,698.80-7,995.18

Finding the Fourth Proportional to 20,478.05, 30,698.80 and 7,995.18

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Solution

The fourth proportional to 20,478.05, 30,698.80 and 7,995.18 is: 11,985.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.05 : 30,698.80 = 7,995.18 : x
  2. Step 2: Convert to fraction form
    20,478.05/30,698.80 = 7,995.18/x
  3. Step 3: Cross multiply
    20,478.05x = 30,698.80 × 7,995.18
  4. Step 4: Simplify right side
    20,478.05x = 245,442,411.80
  5. Step 5: Solve for x
    x = 245,442,411.80/20,478.05
  6. Step 6: Final answer
    x = 11,985.64

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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.