Home / 21,289,746.40-31,934,619.60-19,647,455.20

Finding the Fourth Proportional to 21,289,746.40, 31,934,619.60 and 19,647,455.20

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Solution

The fourth proportional to 21,289,746.40, 31,934,619.60 and 19,647,455.20 is: 29,471,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289,746.40 : 31,934,619.60 = 19,647,455.20 : x
  2. Step 2: Convert to fraction form
    21,289,746.40/31,934,619.60 = 19,647,455.20/x
  3. Step 3: Cross multiply
    21,289,746.40x = 31,934,619.60 × 19,647,455.20
  4. Step 4: Simplify right side
    21,289,746.40x = 627,434,007,920,041.88
  5. Step 5: Solve for x
    x = 627,434,007,920,041.88/21,289,746.40
  6. Step 6: Final answer
    x = 29,471,182.80

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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.