Home / 28,656.45-39,535.02-21,120.75

Finding the Fourth Proportional to 28,656.45, 39,535.02 and 21,120.75

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Solution

The fourth proportional to 28,656.45, 39,535.02 and 21,120.75 is: 29,138.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,656.45 : 39,535.02 = 21,120.75 : x
  2. Step 2: Convert to fraction form
    28,656.45/39,535.02 = 21,120.75/x
  3. Step 3: Cross multiply
    28,656.45x = 39,535.02 × 21,120.75
  4. Step 4: Simplify right side
    28,656.45x = 835,009,273.67
  5. Step 5: Solve for x
    x = 835,009,273.67/28,656.45
  6. Step 6: Final answer
    x = 29,138.62

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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.