Home / 20,862,075.20-31,293,112.80-13,209,324.80

Finding the Fourth Proportional to 20,862,075.20, 31,293,112.80 and 13,209,324.80

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Solution

The fourth proportional to 20,862,075.20, 31,293,112.80 and 13,209,324.80 is: 19,813,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862,075.20 : 31,293,112.80 = 13,209,324.80 : x
  2. Step 2: Convert to fraction form
    20,862,075.20/31,293,112.80 = 13,209,324.80/x
  3. Step 3: Cross multiply
    20,862,075.20x = 31,293,112.80 × 13,209,324.80
  4. Step 4: Simplify right side
    20,862,075.20x = 413,360,890,978,237.50
  5. Step 5: Solve for x
    x = 413,360,890,978,237.50/20,862,075.20
  6. Step 6: Final answer
    x = 19,813,987.20

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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.