Home / 28,362.02-39,139.20-15,786.78

Finding the Fourth Proportional to 28,362.02, 39,139.20 and 15,786.78

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Solution

The fourth proportional to 28,362.02, 39,139.20 and 15,786.78 is: 21,785.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.02 : 39,139.20 = 15,786.78 : x
  2. Step 2: Convert to fraction form
    28,362.02/39,139.20 = 15,786.78/x
  3. Step 3: Cross multiply
    28,362.02x = 39,139.20 × 15,786.78
  4. Step 4: Simplify right side
    28,362.02x = 617,881,939.78
  5. Step 5: Solve for x
    x = 617,881,939.78/28,362.02
  6. Step 6: Final answer
    x = 21,785.54

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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.