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Finding the Fourth Proportional to 12,690,413, 17,512,791.80 and 7,257,905

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Solution

The fourth proportional to 12,690,413, 17,512,791.80 and 7,257,905 is: 10,015,921.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690,413 : 17,512,791.80 = 7,257,905 : x
  2. Step 2: Convert to fraction form
    12,690,413/17,512,791.80 = 7,257,905/x
  3. Step 3: Cross multiply
    12,690,413x = 17,512,791.80 × 7,257,905
  4. Step 4: Simplify right side
    12,690,413x = 127,106,179,169,179
  5. Step 5: Solve for x
    x = 127,106,179,169,179/12,690,413
  6. Step 6: Final answer
    x = 10,015,921.40

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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.