Home / 28,105,209.37-38,807,170.95-21,568,485.07

Finding the Fourth Proportional to 28,105,209.37, 38,807,170.95 and 21,568,485.07

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Solution

The fourth proportional to 28,105,209.37, 38,807,170.95 and 21,568,485.07 is: 29,781,378.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105,209.37 : 38,807,170.95 = 21,568,485.07 : x
  2. Step 2: Convert to fraction form
    28,105,209.37/38,807,170.95 = 21,568,485.07/x
  3. Step 3: Cross multiply
    28,105,209.37x = 38,807,170.95 × 21,568,485.07
  4. Step 4: Simplify right side
    28,105,209.37x = 837,011,887,244,012.75
  5. Step 5: Solve for x
    x = 837,011,887,244,012.75/28,105,209.37
  6. Step 6: Final answer
    x = 29,781,378.83

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1.5x scale

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.