Home / 13,405.07-18,501.62-7,743.47

Finding the Fourth Proportional to 13,405.07, 18,501.62 and 7,743.47

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Solution

The fourth proportional to 13,405.07, 18,501.62 and 7,743.47 is: 10,687.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.07 : 18,501.62 = 7,743.47 : x
  2. Step 2: Convert to fraction form
    13,405.07/18,501.62 = 7,743.47/x
  3. Step 3: Cross multiply
    13,405.07x = 18,501.62 × 7,743.47
  4. Step 4: Simplify right side
    13,405.07x = 143,266,608.20
  5. Step 5: Solve for x
    x = 143,266,608.20/13,405.07
  6. Step 6: Final answer
    x = 10,687.50

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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.