Home / 18,720.06-25,831.35-11,648.76

Finding the Fourth Proportional to 18,720.06, 25,831.35 and 11,648.76

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Solution

The fourth proportional to 18,720.06, 25,831.35 and 11,648.76 is: 16,073.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.06 : 25,831.35 = 11,648.76 : x
  2. Step 2: Convert to fraction form
    18,720.06/25,831.35 = 11,648.76/x
  3. Step 3: Cross multiply
    18,720.06x = 25,831.35 × 11,648.76
  4. Step 4: Simplify right side
    18,720.06x = 300,903,196.63
  5. Step 5: Solve for x
    x = 300,903,196.63/18,720.06
  6. Step 6: Final answer
    x = 16,073.84

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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.