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Finding the Fourth Proportional to 20,912,256,089.60, 31,368,384,134.40 and 20,912,256,089.60

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Solution

The fourth proportional to 20,912,256,089.60, 31,368,384,134.40 and 20,912,256,089.60 is: 31,368,384,134.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912,256,089.60 : 31,368,384,134.40 = 20,912,256,089.60 : x
  2. Step 2: Convert to fraction form
    20,912,256,089.60/31,368,384,134.40 = 20,912,256,089.60/x
  3. Step 3: Cross multiply
    20,912,256,089.60x = 31,368,384,134.40 × 20,912,256,089.60
  4. Step 4: Simplify right side
    20,912,256,089.60x = 655,983,682,135,518,347,264
  5. Step 5: Solve for x
    x = 655,983,682,135,518,347,264/20,912,256,089.60
  6. Step 6: Final answer
    x = 31,368,384,134.40

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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.