Home / 20,386,689.12-28,133,622.63-11,219,331.78

Finding the Fourth Proportional to 20,386,689.12, 28,133,622.63 and 11,219,331.78

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Solution

The fourth proportional to 20,386,689.12, 28,133,622.63 and 11,219,331.78 is: 15,482,673.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386,689.12 : 28,133,622.63 = 11,219,331.78 : x
  2. Step 2: Convert to fraction form
    20,386,689.12/28,133,622.63 = 11,219,331.78/x
  3. Step 3: Cross multiply
    20,386,689.12x = 28,133,622.63 × 11,219,331.78
  4. Step 4: Simplify right side
    20,386,689.12x = 315,640,446,459,286.12
  5. Step 5: Solve for x
    x = 315,640,446,459,286.12/20,386,689.12
  6. Step 6: Final answer
    x = 15,482,673.26

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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.