Home / 13,215.89-18,236.48-7,247.51

Finding the Fourth Proportional to 13,215.89, 18,236.48 and 7,247.51

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Solution

The fourth proportional to 13,215.89, 18,236.48 and 7,247.51 is: 10,000.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.89 : 18,236.48 = 7,247.51 : x
  2. Step 2: Convert to fraction form
    13,215.89/18,236.48 = 7,247.51/x
  3. Step 3: Cross multiply
    13,215.89x = 18,236.48 × 7,247.51
  4. Step 4: Simplify right side
    13,215.89x = 132,169,012.13
  5. Step 5: Solve for x
    x = 132,169,012.13/13,215.89
  6. Step 6: Final answer
    x = 10,000.76

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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.