Home / 21,005,910.80-31,508,866.20-19,363,619.60

Finding the Fourth Proportional to 21,005,910.80, 31,508,866.20 and 19,363,619.60

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Solution

The fourth proportional to 21,005,910.80, 31,508,866.20 and 19,363,619.60 is: 29,045,429.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,910.80 : 31,508,866.20 = 19,363,619.60 : x
  2. Step 2: Convert to fraction form
    21,005,910.80/31,508,866.20 = 19,363,619.60/x
  3. Step 3: Cross multiply
    21,005,910.80x = 31,508,866.20 × 19,363,619.60
  4. Step 4: Simplify right side
    21,005,910.80x = 610,125,699,124,097.50
  5. Step 5: Solve for x
    x = 610,125,699,124,097.50/21,005,910.80
  6. Step 6: Final answer
    x = 29,045,429.40

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1.5x scale

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.