Home / 20,915,980.96-28,859,576.40-12,210,202.72

Finding the Fourth Proportional to 20,915,980.96, 28,859,576.40 and 12,210,202.72

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Solution

The fourth proportional to 20,915,980.96, 28,859,576.40 and 12,210,202.72 is: 16,847,466.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915,980.96 : 28,859,576.40 = 12,210,202.72 : x
  2. Step 2: Convert to fraction form
    20,915,980.96/28,859,576.40 = 12,210,202.72/x
  3. Step 3: Cross multiply
    20,915,980.96x = 28,859,576.40 × 12,210,202.72
  4. Step 4: Simplify right side
    20,915,980.96x = 352,381,278,257,327.81
  5. Step 5: Solve for x
    x = 352,381,278,257,327.81/20,915,980.96
  6. Step 6: Final answer
    x = 16,847,466.01

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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.