Home / 28,435.57-39,239.44-15,688.80

Finding the Fourth Proportional to 28,435.57, 39,239.44 and 15,688.80

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Solution

The fourth proportional to 28,435.57, 39,239.44 and 15,688.80 is: 21,649.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,435.57 : 39,239.44 = 15,688.80 : x
  2. Step 2: Convert to fraction form
    28,435.57/39,239.44 = 15,688.80/x
  3. Step 3: Cross multiply
    28,435.57x = 39,239.44 × 15,688.80
  4. Step 4: Simplify right side
    28,435.57x = 615,619,687.05
  5. Step 5: Solve for x
    x = 615,619,687.05/28,435.57
  6. Step 6: Final answer
    x = 21,649.64

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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.