Home / 28,275.36-39,002.68-20,328.36

Finding the Fourth Proportional to 28,275.36, 39,002.68 and 20,328.36

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Solution

The fourth proportional to 28,275.36, 39,002.68 and 20,328.36 is: 28,040.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,275.36 : 39,002.68 = 20,328.36 : x
  2. Step 2: Convert to fraction form
    28,275.36/39,002.68 = 20,328.36/x
  3. Step 3: Cross multiply
    28,275.36x = 39,002.68 × 20,328.36
  4. Step 4: Simplify right side
    28,275.36x = 792,860,520.00
  5. Step 5: Solve for x
    x = 792,860,520.00/28,275.36
  6. Step 6: Final answer
    x = 28,040.69

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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.