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Finding the Fourth Proportional to 12,928,486,021.20, 19,392,729,031.80 and 12,928,486,021.20

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Solution

The fourth proportional to 12,928,486,021.20, 19,392,729,031.80 and 12,928,486,021.20 is: 19,392,729,031.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928,486,021.20 : 19,392,729,031.80 = 12,928,486,021.20 : x
  2. Step 2: Convert to fraction form
    12,928,486,021.20/19,392,729,031.80 = 12,928,486,021.20/x
  3. Step 3: Cross multiply
    12,928,486,021.20x = 19,392,729,031.80 × 12,928,486,021.20
  4. Step 4: Simplify right side
    12,928,486,021.20x = 250,718,626,200,545,722,368
  5. Step 5: Solve for x
    x = 250,718,626,200,545,722,368/12,928,486,021.20
  6. Step 6: Final answer
    x = 19,392,729,031.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.