Home / 39,128.40-53,996.20-21,900.51

Finding the Fourth Proportional to 39,128.40, 53,996.20 and 21,900.51

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Solution

The fourth proportional to 39,128.40, 53,996.20 and 21,900.51 is: 30,222.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,128.40 : 53,996.20 = 21,900.51 : x
  2. Step 2: Convert to fraction form
    39,128.40/53,996.20 = 21,900.51/x
  3. Step 3: Cross multiply
    39,128.40x = 53,996.20 × 21,900.51
  4. Step 4: Simplify right side
    39,128.40x = 1,182,544,318.06
  5. Step 5: Solve for x
    x = 1,182,544,318.06/39,128.40
  6. Step 6: Final answer
    x = 30,222.15

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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.