Home / 21,004,043.80-31,506,065.70-12,021,208.60

Finding the Fourth Proportional to 21,004,043.80, 31,506,065.70 and 12,021,208.60

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Solution

The fourth proportional to 21,004,043.80, 31,506,065.70 and 12,021,208.60 is: 18,031,812.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004,043.80 : 31,506,065.70 = 12,021,208.60 : x
  2. Step 2: Convert to fraction form
    21,004,043.80/31,506,065.70 = 12,021,208.60/x
  3. Step 3: Cross multiply
    21,004,043.80x = 31,506,065.70 × 12,021,208.60
  4. Step 4: Simplify right side
    21,004,043.80x = 378,740,987,945,005
  5. Step 5: Solve for x
    x = 378,740,987,945,005/21,004,043.80
  6. Step 6: Final answer
    x = 18,031,812.90

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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.