Home / 13,690.07-18,892.82-7,721.39

Finding the Fourth Proportional to 13,690.07, 18,892.82 and 7,721.39

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Solution

The fourth proportional to 13,690.07, 18,892.82 and 7,721.39 is: 10,655.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.07 : 18,892.82 = 7,721.39 : x
  2. Step 2: Convert to fraction form
    13,690.07/18,892.82 = 7,721.39/x
  3. Step 3: Cross multiply
    13,690.07x = 18,892.82 × 7,721.39
  4. Step 4: Simplify right side
    13,690.07x = 145,878,831.42
  5. Step 5: Solve for x
    x = 145,878,831.42/13,690.07
  6. Step 6: Final answer
    x = 10,655.81

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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.