Home / 13,709.07-18,918.54-7,421.46

Finding the Fourth Proportional to 13,709.07, 18,918.54 and 7,421.46

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Solution

The fourth proportional to 13,709.07, 18,918.54 and 7,421.46 is: 10,241.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.07 : 18,918.54 = 7,421.46 : x
  2. Step 2: Convert to fraction form
    13,709.07/18,918.54 = 7,421.46/x
  3. Step 3: Cross multiply
    13,709.07x = 18,918.54 × 7,421.46
  4. Step 4: Simplify right side
    13,709.07x = 140,403,187.87
  5. Step 5: Solve for x
    x = 140,403,187.87/13,709.07
  6. Step 6: Final answer
    x = 10,241.63

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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.