Home / 28,485.62-39,254.63-20,512.79

Finding the Fourth Proportional to 28,485.62, 39,254.63 and 20,512.79

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Solution

The fourth proportional to 28,485.62, 39,254.63 and 20,512.79 is: 28,267.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.62 : 39,254.63 = 20,512.79 : x
  2. Step 2: Convert to fraction form
    28,485.62/39,254.63 = 20,512.79/x
  3. Step 3: Cross multiply
    28,485.62x = 39,254.63 × 20,512.79
  4. Step 4: Simplify right side
    28,485.62x = 805,221,682.88
  5. Step 5: Solve for x
    x = 805,221,682.88/28,485.62
  6. Step 6: Final answer
    x = 28,267.66

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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.