Home / 20,706,891.40-31,024,907.70-13,124,999.80

Finding the Fourth Proportional to 20,706,891.40, 31,024,907.70 and 13,124,999.80

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Solution

The fourth proportional to 20,706,891.40, 31,024,907.70 and 13,124,999.80 is: 19,665,042.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706,891.40 : 31,024,907.70 = 13,124,999.80 : x
  2. Step 2: Convert to fraction form
    20,706,891.40/31,024,907.70 = 13,124,999.80/x
  3. Step 3: Cross multiply
    20,706,891.40x = 31,024,907.70 × 13,124,999.80
  4. Step 4: Simplify right side
    20,706,891.40x = 407,201,907,357,518.50
  5. Step 5: Solve for x
    x = 407,201,907,357,518.50/20,706,891.40
  6. Step 6: Final answer
    x = 19,665,042.88

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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.