Home / 20,748.24-31,130.40-7,609.68

Finding the Fourth Proportional to 20,748.24, 31,130.40 and 7,609.68

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Solution

The fourth proportional to 20,748.24, 31,130.40 and 7,609.68 is: 11,417.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.24 : 31,130.40 = 7,609.68 : x
  2. Step 2: Convert to fraction form
    20,748.24/31,130.40 = 7,609.68/x
  3. Step 3: Cross multiply
    20,748.24x = 31,130.40 × 7,609.68
  4. Step 4: Simplify right side
    20,748.24x = 236,892,382.27
  5. Step 5: Solve for x
    x = 236,892,382.27/20,748.24
  6. Step 6: Final answer
    x = 11,417.47

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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.