Home / 39,285.39-54,212.80-21,380.02

Finding the Fourth Proportional to 39,285.39, 54,212.80 and 21,380.02

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Solution

The fourth proportional to 39,285.39, 54,212.80 and 21,380.02 is: 29,503.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,285.39 : 54,212.80 = 21,380.02 : x
  2. Step 2: Convert to fraction form
    39,285.39/54,212.80 = 21,380.02/x
  3. Step 3: Cross multiply
    39,285.39x = 54,212.80 × 21,380.02
  4. Step 4: Simplify right side
    39,285.39x = 1,159,070,477.19
  5. Step 5: Solve for x
    x = 1,159,070,477.19/39,285.39
  6. Step 6: Final answer
    x = 29,503.86

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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.