Home / 20,130.53-27,781.43-11,178

Finding the Fourth Proportional to 20,130.53, 27,781.43 and 11,178

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Solution

The fourth proportional to 20,130.53, 27,781.43 and 11,178 is: 15,426.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.53 : 27,781.43 = 11,178 : x
  2. Step 2: Convert to fraction form
    20,130.53/27,781.43 = 11,178/x
  3. Step 3: Cross multiply
    20,130.53x = 27,781.43 × 11,178
  4. Step 4: Simplify right side
    20,130.53x = 310,540,831.53
  5. Step 5: Solve for x
    x = 310,540,831.53/20,130.53
  6. Step 6: Final answer
    x = 15,426.37

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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.