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Finding the Fourth Proportional to 20,778,884.10, 31,168,326.15 and 20,778,884.10

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Solution

The fourth proportional to 20,778,884.10, 31,168,326.15 and 20,778,884.10 is: 31,168,326.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778,884.10 : 31,168,326.15 = 20,778,884.10 : x
  2. Step 2: Convert to fraction form
    20,778,884.10/31,168,326.15 = 20,778,884.10/x
  3. Step 3: Cross multiply
    20,778,884.10x = 31,168,326.15 × 20,778,884.10
  4. Step 4: Simplify right side
    20,778,884.10x = 647,643,036,661,849.25
  5. Step 5: Solve for x
    x = 647,643,036,661,849.25/20,778,884.10
  6. Step 6: Final answer
    x = 31,168,326.15

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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.