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Finding the Fourth Proportional to 12,999.74, 17,938.98 and 7,334.55

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Solution

The fourth proportional to 12,999.74, 17,938.98 and 7,334.55 is: 10,121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.74 : 17,938.98 = 7,334.55 : x
  2. Step 2: Convert to fraction form
    12,999.74/17,938.98 = 7,334.55/x
  3. Step 3: Cross multiply
    12,999.74x = 17,938.98 × 7,334.55
  4. Step 4: Simplify right side
    12,999.74x = 131,574,345.76
  5. Step 5: Solve for x
    x = 131,574,345.76/12,999.74
  6. Step 6: Final answer
    x = 10,121.31

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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.