Home / 13,120.47-18,101.93-7,814.57

Finding the Fourth Proportional to 13,120.47, 18,101.93 and 7,814.57

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Solution

The fourth proportional to 13,120.47, 18,101.93 and 7,814.57 is: 10,781.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.47 : 18,101.93 = 7,814.57 : x
  2. Step 2: Convert to fraction form
    13,120.47/18,101.93 = 7,814.57/x
  3. Step 3: Cross multiply
    13,120.47x = 18,101.93 × 7,814.57
  4. Step 4: Simplify right side
    13,120.47x = 141,458,669.54
  5. Step 5: Solve for x
    x = 141,458,669.54/13,120.47
  6. Step 6: Final answer
    x = 10,781.52

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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.