Home / 21,021,788.40-31,532,682.60-20,880,070.80

Finding the Fourth Proportional to 21,021,788.40, 31,532,682.60 and 20,880,070.80

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Solution

The fourth proportional to 21,021,788.40, 31,532,682.60 and 20,880,070.80 is: 31,320,106.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021,788.40 : 31,532,682.60 = 20,880,070.80 : x
  2. Step 2: Convert to fraction form
    21,021,788.40/31,532,682.60 = 20,880,070.80/x
  3. Step 3: Cross multiply
    21,021,788.40x = 31,532,682.60 × 20,880,070.80
  4. Step 4: Simplify right side
    21,021,788.40x = 658,404,645,201,928.12
  5. Step 5: Solve for x
    x = 658,404,645,201,928.12/21,021,788.40
  6. Step 6: Final answer
    x = 31,320,106.20

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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.