Home / 28,575.19-39,433.93-15,828.78

Finding the Fourth Proportional to 28,575.19, 39,433.93 and 15,828.78

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Solution

The fourth proportional to 28,575.19, 39,433.93 and 15,828.78 is: 21,843.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,575.19 : 39,433.93 = 15,828.78 : x
  2. Step 2: Convert to fraction form
    28,575.19/39,433.93 = 15,828.78/x
  3. Step 3: Cross multiply
    28,575.19x = 39,433.93 × 15,828.78
  4. Step 4: Simplify right side
    28,575.19x = 624,191,110.81
  5. Step 5: Solve for x
    x = 624,191,110.81/28,575.19
  6. Step 6: Final answer
    x = 21,843.81

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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.