Home / 13,434.24-18,536.40-7,842.72

Finding the Fourth Proportional to 13,434.24, 18,536.40 and 7,842.72

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Solution

The fourth proportional to 13,434.24, 18,536.40 and 7,842.72 is: 10,821.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,434.24 : 18,536.40 = 7,842.72 : x
  2. Step 2: Convert to fraction form
    13,434.24/18,536.40 = 7,842.72/x
  3. Step 3: Cross multiply
    13,434.24x = 18,536.40 × 7,842.72
  4. Step 4: Simplify right side
    13,434.24x = 145,375,795.01
  5. Step 5: Solve for x
    x = 145,375,795.01/13,434.24
  6. Step 6: Final answer
    x = 10,821.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.