Home / 28,355.57-39,128.37-16,419.68

Finding the Fourth Proportional to 28,355.57, 39,128.37 and 16,419.68

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Solution

The fourth proportional to 28,355.57, 39,128.37 and 16,419.68 is: 22,657.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.57 : 39,128.37 = 16,419.68 : x
  2. Step 2: Convert to fraction form
    28,355.57/39,128.37 = 16,419.68/x
  3. Step 3: Cross multiply
    28,355.57x = 39,128.37 × 16,419.68
  4. Step 4: Simplify right side
    28,355.57x = 642,475,203.84
  5. Step 5: Solve for x
    x = 642,475,203.84/28,355.57
  6. Step 6: Final answer
    x = 22,657.81

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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.