Home / 28,406.88-39,203.04-15,831.84

Finding the Fourth Proportional to 28,406.88, 39,203.04 and 15,831.84

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Solution

The fourth proportional to 28,406.88, 39,203.04 and 15,831.84 is: 21,848.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.88 : 39,203.04 = 15,831.84 : x
  2. Step 2: Convert to fraction form
    28,406.88/39,203.04 = 15,831.84/x
  3. Step 3: Cross multiply
    28,406.88x = 39,203.04 × 15,831.84
  4. Step 4: Simplify right side
    28,406.88x = 620,656,256.79
  5. Step 5: Solve for x
    x = 620,656,256.79/28,406.88
  6. Step 6: Final answer
    x = 21,848.80

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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.