Home / 20,803,420.42-28,706,204.79-11,985,756.37

Finding the Fourth Proportional to 20,803,420.42, 28,706,204.79 and 11,985,756.37

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Solution

The fourth proportional to 20,803,420.42, 28,706,204.79 and 11,985,756.37 is: 16,538,894.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803,420.42 : 28,706,204.79 = 11,985,756.37 : x
  2. Step 2: Convert to fraction form
    20,803,420.42/28,706,204.79 = 11,985,756.37/x
  3. Step 3: Cross multiply
    20,803,420.42x = 28,706,204.79 × 11,985,756.37
  4. Step 4: Simplify right side
    20,803,420.42x = 344,065,576,920,267
  5. Step 5: Solve for x
    x = 344,065,576,920,267/20,803,420.42
  6. Step 6: Final answer
    x = 16,538,894.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.