Home / 21,102,979.70-31,654,469.55-12,480,950.90

Finding the Fourth Proportional to 21,102,979.70, 31,654,469.55 and 12,480,950.90

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Solution

The fourth proportional to 21,102,979.70, 31,654,469.55 and 12,480,950.90 is: 18,721,426.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102,979.70 : 31,654,469.55 = 12,480,950.90 : x
  2. Step 2: Convert to fraction form
    21,102,979.70/31,654,469.55 = 12,480,950.90/x
  3. Step 3: Cross multiply
    21,102,979.70x = 31,654,469.55 × 12,480,950.90
  4. Step 4: Simplify right side
    21,102,979.70x = 395,077,880,219,095.12
  5. Step 5: Solve for x
    x = 395,077,880,219,095.12/21,102,979.70
  6. Step 6: Final answer
    x = 18,721,426.35

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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.