Home / 13,386.12-18,474.21-7,721.07

Finding the Fourth Proportional to 13,386.12, 18,474.21 and 7,721.07

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Solution

The fourth proportional to 13,386.12, 18,474.21 and 7,721.07 is: 10,655.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.12 : 18,474.21 = 7,721.07 : x
  2. Step 2: Convert to fraction form
    13,386.12/18,474.21 = 7,721.07/x
  3. Step 3: Cross multiply
    13,386.12x = 18,474.21 × 7,721.07
  4. Step 4: Simplify right side
    13,386.12x = 142,640,668.60
  5. Step 5: Solve for x
    x = 142,640,668.60/13,386.12
  6. Step 6: Final answer
    x = 10,655.86

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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.