Home / 21,390.95-29,519.10-11,831.67

Finding the Fourth Proportional to 21,390.95, 29,519.10 and 11,831.67

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Solution

The fourth proportional to 21,390.95, 29,519.10 and 11,831.67 is: 16,327.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.95 : 29,519.10 = 11,831.67 : x
  2. Step 2: Convert to fraction form
    21,390.95/29,519.10 = 11,831.67/x
  3. Step 3: Cross multiply
    21,390.95x = 29,519.10 × 11,831.67
  4. Step 4: Simplify right side
    21,390.95x = 349,260,249.90
  5. Step 5: Solve for x
    x = 349,260,249.90/21,390.95
  6. Step 6: Final answer
    x = 16,327.48

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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.