Home / 28,254.56-39,025.78-20,690.26

Finding the Fourth Proportional to 28,254.56, 39,025.78 and 20,690.26

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Solution

The fourth proportional to 28,254.56, 39,025.78 and 20,690.26 is: 28,577.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.56 : 39,025.78 = 20,690.26 : x
  2. Step 2: Convert to fraction form
    28,254.56/39,025.78 = 20,690.26/x
  3. Step 3: Cross multiply
    28,254.56x = 39,025.78 × 20,690.26
  4. Step 4: Simplify right side
    28,254.56x = 807,453,385.61
  5. Step 5: Solve for x
    x = 807,453,385.61/28,254.56
  6. Step 6: Final answer
    x = 28,577.81

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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.