Home / 20,938.08-31,380.36-9,820.24

Finding the Fourth Proportional to 20,938.08, 31,380.36 and 9,820.24

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Solution

The fourth proportional to 20,938.08, 31,380.36 and 9,820.24 is: 14,717.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.08 : 31,380.36 = 9,820.24 : x
  2. Step 2: Convert to fraction form
    20,938.08/31,380.36 = 9,820.24/x
  3. Step 3: Cross multiply
    20,938.08x = 31,380.36 × 9,820.24
  4. Step 4: Simplify right side
    20,938.08x = 308,162,666.49
  5. Step 5: Solve for x
    x = 308,162,666.49/20,938.08
  6. Step 6: Final answer
    x = 14,717.81

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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.