Home / 28,555.36-39,405.10-15,809.02

Finding the Fourth Proportional to 28,555.36, 39,405.10 and 15,809.02

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Solution

The fourth proportional to 28,555.36, 39,405.10 and 15,809.02 is: 21,815.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.36 : 39,405.10 = 15,809.02 : x
  2. Step 2: Convert to fraction form
    28,555.36/39,405.10 = 15,809.02/x
  3. Step 3: Cross multiply
    28,555.36x = 39,405.10 × 15,809.02
  4. Step 4: Simplify right side
    28,555.36x = 622,956,014.00
  5. Step 5: Solve for x
    x = 622,956,014.00/28,555.36
  6. Step 6: Final answer
    x = 21,815.73

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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.