Home / 42,120.84-58,135.86-28,724.07

Finding the Fourth Proportional to 42,120.84, 58,135.86 and 28,724.07

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Solution

The fourth proportional to 42,120.84, 58,135.86 and 28,724.07 is: 39,645.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,120.84 : 58,135.86 = 28,724.07 : x
  2. Step 2: Convert to fraction form
    42,120.84/58,135.86 = 28,724.07/x
  3. Step 3: Cross multiply
    42,120.84x = 58,135.86 × 28,724.07
  4. Step 4: Simplify right side
    42,120.84x = 1,669,898,512.15
  5. Step 5: Solve for x
    x = 1,669,898,512.15/42,120.84
  6. Step 6: Final answer
    x = 39,645.42

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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.