Home / 13,215.49-18,237.90-7,247.37

Finding the Fourth Proportional to 13,215.49, 18,237.90 and 7,247.37

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Solution

The fourth proportional to 13,215.49, 18,237.90 and 7,247.37 is: 10,001.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.49 : 18,237.90 = 7,247.37 : x
  2. Step 2: Convert to fraction form
    13,215.49/18,237.90 = 7,247.37/x
  3. Step 3: Cross multiply
    13,215.49x = 18,237.90 × 7,247.37
  4. Step 4: Simplify right side
    13,215.49x = 132,176,904.89
  5. Step 5: Solve for x
    x = 132,176,904.89/13,215.49
  6. Step 6: Final answer
    x = 10,001.66

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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.