Home / 20,693,675.40-28,555,905.78-12,428,826.72

Finding the Fourth Proportional to 20,693,675.40, 28,555,905.78 and 12,428,826.72

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Solution

The fourth proportional to 20,693,675.40, 28,555,905.78 and 12,428,826.72 is: 17,150,960.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693,675.40 : 28,555,905.78 = 12,428,826.72 : x
  2. Step 2: Convert to fraction form
    20,693,675.40/28,555,905.78 = 12,428,826.72/x
  3. Step 3: Cross multiply
    20,693,675.40x = 28,555,905.78 × 12,428,826.72
  4. Step 4: Simplify right side
    20,693,675.40x = 354,916,404,772,266.50
  5. Step 5: Solve for x
    x = 354,916,404,772,266.50/20,693,675.40
  6. Step 6: Final answer
    x = 17,150,960.28

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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.