Home / 39,071.36-53,918.06-21,165.30

Finding the Fourth Proportional to 39,071.36, 53,918.06 and 21,165.30

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Solution

The fourth proportional to 39,071.36, 53,918.06 and 21,165.30 is: 29,207.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,071.36 : 53,918.06 = 21,165.30 : x
  2. Step 2: Convert to fraction form
    39,071.36/53,918.06 = 21,165.30/x
  3. Step 3: Cross multiply
    39,071.36x = 53,918.06 × 21,165.30
  4. Step 4: Simplify right side
    39,071.36x = 1,141,191,809.49
  5. Step 5: Solve for x
    x = 1,141,191,809.49/39,071.36
  6. Step 6: Final answer
    x = 29,207.88

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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.