Home / 19,408.40-29,080.20-12,831.20

Finding the Fourth Proportional to 19,408.40, 29,080.20 and 12,831.20

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Solution

The fourth proportional to 19,408.40, 29,080.20 and 12,831.20 is: 19,225.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,408.40 : 29,080.20 = 12,831.20 : x
  2. Step 2: Convert to fraction form
    19,408.40/29,080.20 = 12,831.20/x
  3. Step 3: Cross multiply
    19,408.40x = 29,080.20 × 12,831.20
  4. Step 4: Simplify right side
    19,408.40x = 373,133,862.24
  5. Step 5: Solve for x
    x = 373,133,862.24/19,408.40
  6. Step 6: Final answer
    x = 19,225.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.