Home / 20,913.20-31,369.80-5,330.24

Finding the Fourth Proportional to 20,913.20, 31,369.80 and 5,330.24

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Solution

The fourth proportional to 20,913.20, 31,369.80 and 5,330.24 is: 7,995.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.20 : 31,369.80 = 5,330.24 : x
  2. Step 2: Convert to fraction form
    20,913.20/31,369.80 = 5,330.24/x
  3. Step 3: Cross multiply
    20,913.20x = 31,369.80 × 5,330.24
  4. Step 4: Simplify right side
    20,913.20x = 167,208,562.75
  5. Step 5: Solve for x
    x = 167,208,562.75/20,913.20
  6. Step 6: Final answer
    x = 7,995.36

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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.