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Finding the Fourth Proportional to 12,690,407, 17,512,783.54 and 7,257,899

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Solution

The fourth proportional to 12,690,407, 17,512,783.54 and 7,257,899 is: 10,015,913.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690,407 : 17,512,783.54 = 7,257,899 : x
  2. Step 2: Convert to fraction form
    12,690,407/17,512,783.54 = 7,257,899/x
  3. Step 3: Cross multiply
    12,690,407x = 17,512,783.54 × 7,257,899
  4. Step 4: Simplify right side
    12,690,407x = 127,106,014,142,182.45
  5. Step 5: Solve for x
    x = 127,106,014,142,182.45/12,690,407
  6. Step 6: Final answer
    x = 10,015,913.13

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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.