Home / 39,105.60-53,965.80-21,200.55

Finding the Fourth Proportional to 39,105.60, 53,965.80 and 21,200.55

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Solution

The fourth proportional to 39,105.60, 53,965.80 and 21,200.55 is: 29,256.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,105.60 : 53,965.80 = 21,200.55 : x
  2. Step 2: Convert to fraction form
    39,105.60/53,965.80 = 21,200.55/x
  3. Step 3: Cross multiply
    39,105.60x = 53,965.80 × 21,200.55
  4. Step 4: Simplify right side
    39,105.60x = 1,144,104,641.19
  5. Step 5: Solve for x
    x = 1,144,104,641.19/39,105.60
  6. Step 6: Final answer
    x = 29,256.80

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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.