Home / 39,105.10-53,965.11-21,200.05

Finding the Fourth Proportional to 39,105.10, 53,965.11 and 21,200.05

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Solution

The fourth proportional to 39,105.10, 53,965.11 and 21,200.05 is: 29,256.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,105.10 : 53,965.11 = 21,200.05 : x
  2. Step 2: Convert to fraction form
    39,105.10/53,965.11 = 21,200.05/x
  3. Step 3: Cross multiply
    39,105.10x = 53,965.11 × 21,200.05
  4. Step 4: Simplify right side
    39,105.10x = 1,144,063,030.26
  5. Step 5: Solve for x
    x = 1,144,063,030.26/39,105.10
  6. Step 6: Final answer
    x = 29,256.11

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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.