Home / 28,485.96-39,330.06-18,438.72

Finding the Fourth Proportional to 28,485.96, 39,330.06 and 18,438.72

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Solution

The fourth proportional to 28,485.96, 39,330.06 and 18,438.72 is: 25,458.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.96 : 39,330.06 = 18,438.72 : x
  2. Step 2: Convert to fraction form
    28,485.96/39,330.06 = 18,438.72/x
  3. Step 3: Cross multiply
    28,485.96x = 39,330.06 × 18,438.72
  4. Step 4: Simplify right side
    28,485.96x = 725,195,963.92
  5. Step 5: Solve for x
    x = 725,195,963.92/28,485.96
  6. Step 6: Final answer
    x = 25,458.01

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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.