Home / 20,756.24-31,142.40-7,617.68

Finding the Fourth Proportional to 20,756.24, 31,142.40 and 7,617.68

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Solution

The fourth proportional to 20,756.24, 31,142.40 and 7,617.68 is: 11,429.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.24 : 31,142.40 = 7,617.68 : x
  2. Step 2: Convert to fraction form
    20,756.24/31,142.40 = 7,617.68/x
  3. Step 3: Cross multiply
    20,756.24x = 31,142.40 × 7,617.68
  4. Step 4: Simplify right side
    20,756.24x = 237,232,837.63
  5. Step 5: Solve for x
    x = 237,232,837.63/20,756.24
  6. Step 6: Final answer
    x = 11,429.47

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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.