Home / 21,124,702,979.10-31,687,054,468.65-18,920,710,863.90

Finding the Fourth Proportional to 21,124,702,979.10, 31,687,054,468.65 and 18,920,710,863.90

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Solution

The fourth proportional to 21,124,702,979.10, 31,687,054,468.65 and 18,920,710,863.90 is: 28,381,066,295.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124,702,979.10 : 31,687,054,468.65 = 18,920,710,863.90 : x
  2. Step 2: Convert to fraction form
    21,124,702,979.10/31,687,054,468.65 = 18,920,710,863.90/x
  3. Step 3: Cross multiply
    21,124,702,979.10x = 31,687,054,468.65 × 18,920,710,863.90
  4. Step 4: Simplify right side
    21,124,702,979.10x = 599,541,595,729,977,147,392
  5. Step 5: Solve for x
    x = 599,541,595,729,977,147,392/21,124,702,979.10
  6. Step 6: Final answer
    x = 28,381,066,295.85

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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.