Home / 30,998,151,618.30-42,790,672,073.16-20,842,765,829.10

Finding the Fourth Proportional to 30,998,151,618.30, 42,790,672,073.16 and 20,842,765,829.10

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Solution

The fourth proportional to 30,998,151,618.30, 42,790,672,073.16 and 20,842,765,829.10 is: 28,771,907,714.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,998,151,618.30 : 42,790,672,073.16 = 20,842,765,829.10 : x
  2. Step 2: Convert to fraction form
    30,998,151,618.30/42,790,672,073.16 = 20,842,765,829.10/x
  3. Step 3: Cross multiply
    30,998,151,618.30x = 42,790,672,073.16 × 20,842,765,829.10
  4. Step 4: Simplify right side
    30,998,151,618.30x = 891,875,957,690,682,966,016
  5. Step 5: Solve for x
    x = 891,875,957,690,682,966,016/30,998,151,618.30
  6. Step 6: Final answer
    x = 28,771,907,714.79

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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.