Home / 39,905.04-55,066.40-21,999.06

Finding the Fourth Proportional to 39,905.04, 55,066.40 and 21,999.06

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Solution

The fourth proportional to 39,905.04, 55,066.40 and 21,999.06 is: 30,357.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,905.04 : 55,066.40 = 21,999.06 : x
  2. Step 2: Convert to fraction form
    39,905.04/55,066.40 = 21,999.06/x
  3. Step 3: Cross multiply
    39,905.04x = 55,066.40 × 21,999.06
  4. Step 4: Simplify right side
    39,905.04x = 1,211,409,037.58
  5. Step 5: Solve for x
    x = 1,211,409,037.58/39,905.04
  6. Step 6: Final answer
    x = 30,357.29

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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.