Home / 28,278.56-39,025.50-15,705.68

Finding the Fourth Proportional to 28,278.56, 39,025.50 and 15,705.68

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Solution

The fourth proportional to 28,278.56, 39,025.50 and 15,705.68 is: 21,674.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.56 : 39,025.50 = 15,705.68 : x
  2. Step 2: Convert to fraction form
    28,278.56/39,025.50 = 15,705.68/x
  3. Step 3: Cross multiply
    28,278.56x = 39,025.50 × 15,705.68
  4. Step 4: Simplify right side
    28,278.56x = 612,922,014.84
  5. Step 5: Solve for x
    x = 612,922,014.84/28,278.56
  6. Step 6: Final answer
    x = 21,674.44

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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.