Home / 12,912,989.12-17,820,730.32-7,111,769.12

Finding the Fourth Proportional to 12,912,989.12, 17,820,730.32 and 7,111,769.12

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Solution

The fourth proportional to 12,912,989.12, 17,820,730.32 and 7,111,769.12 is: 9,814,684.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912,989.12 : 17,820,730.32 = 7,111,769.12 : x
  2. Step 2: Convert to fraction form
    12,912,989.12/17,820,730.32 = 7,111,769.12/x
  3. Step 3: Cross multiply
    12,912,989.12x = 17,820,730.32 × 7,111,769.12
  4. Step 4: Simplify right side
    12,912,989.12x = 126,736,919,585,623.72
  5. Step 5: Solve for x
    x = 126,736,919,585,623.72/12,912,989.12
  6. Step 6: Final answer
    x = 9,814,684.92

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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.