Home / 12,991,972.79-17,928,928.06-7,111,640.51

Finding the Fourth Proportional to 12,991,972.79, 17,928,928.06 and 7,111,640.51

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Solution

The fourth proportional to 12,991,972.79, 17,928,928.06 and 7,111,640.51 is: 9,814,066.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991,972.79 : 17,928,928.06 = 7,111,640.51 : x
  2. Step 2: Convert to fraction form
    12,991,972.79/17,928,928.06 = 7,111,640.51/x
  3. Step 3: Cross multiply
    12,991,972.79x = 17,928,928.06 × 7,111,640.51
  4. Step 4: Simplify right side
    12,991,972.79x = 127,504,091,119,414.94
  5. Step 5: Solve for x
    x = 127,504,091,119,414.94/12,991,972.79
  6. Step 6: Final answer
    x = 9,814,066.98

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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.