Home / 21,021,807.90-31,532,711.85-20,880,090.30

Finding the Fourth Proportional to 21,021,807.90, 31,532,711.85 and 20,880,090.30

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Solution

The fourth proportional to 21,021,807.90, 31,532,711.85 and 20,880,090.30 is: 31,320,135.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021,807.90 : 31,532,711.85 = 20,880,090.30 : x
  2. Step 2: Convert to fraction form
    21,021,807.90/31,532,711.85 = 20,880,090.30/x
  3. Step 3: Cross multiply
    21,021,807.90x = 31,532,711.85 × 20,880,090.30
  4. Step 4: Simplify right side
    21,021,807.90x = 658,405,870,831,880.12
  5. Step 5: Solve for x
    x = 658,405,870,831,880.12/21,021,807.90
  6. Step 6: Final answer
    x = 31,320,135.45

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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.