Home / 20,720.24-31,050.12-10,317.68

Finding the Fourth Proportional to 20,720.24, 31,050.12 and 10,317.68

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Solution

The fourth proportional to 20,720.24, 31,050.12 and 10,317.68 is: 15,461.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.24 : 31,050.12 = 10,317.68 : x
  2. Step 2: Convert to fraction form
    20,720.24/31,050.12 = 10,317.68/x
  3. Step 3: Cross multiply
    20,720.24x = 31,050.12 × 10,317.68
  4. Step 4: Simplify right side
    20,720.24x = 320,365,202.12
  5. Step 5: Solve for x
    x = 320,365,202.12/20,720.24
  6. Step 6: Final answer
    x = 15,461.46

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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.