Home / 28,406.79-39,202.70-15,831.63

Finding the Fourth Proportional to 28,406.79, 39,202.70 and 15,831.63

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Solution

The fourth proportional to 28,406.79, 39,202.70 and 15,831.63 is: 21,848.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.79 : 39,202.70 = 15,831.63 : x
  2. Step 2: Convert to fraction form
    28,406.79/39,202.70 = 15,831.63/x
  3. Step 3: Cross multiply
    28,406.79x = 39,202.70 × 15,831.63
  4. Step 4: Simplify right side
    28,406.79x = 620,642,484.97
  5. Step 5: Solve for x
    x = 620,642,484.97/28,406.79
  6. Step 6: Final answer
    x = 21,848.39

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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.