Home / 39,190.68-54,083.70-21,285.72

Finding the Fourth Proportional to 39,190.68, 54,083.70 and 21,285.72

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Solution

The fourth proportional to 39,190.68, 54,083.70 and 21,285.72 is: 29,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,190.68 : 54,083.70 = 21,285.72 : x
  2. Step 2: Convert to fraction form
    39,190.68/54,083.70 = 21,285.72/x
  3. Step 3: Cross multiply
    39,190.68x = 54,083.70 × 21,285.72
  4. Step 4: Simplify right side
    39,190.68x = 1,151,210,494.76
  5. Step 5: Solve for x
    x = 1,151,210,494.76/39,190.68
  6. Step 6: Final answer
    x = 29,374.60

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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.