Home / 28,313.40-39,114.86-18,645.83

Finding the Fourth Proportional to 28,313.40, 39,114.86 and 18,645.83

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Solution

The fourth proportional to 28,313.40, 39,114.86 and 18,645.83 is: 25,759.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,313.40 : 39,114.86 = 18,645.83 : x
  2. Step 2: Convert to fraction form
    28,313.40/39,114.86 = 18,645.83/x
  3. Step 3: Cross multiply
    28,313.40x = 39,114.86 × 18,645.83
  4. Step 4: Simplify right side
    28,313.40x = 729,329,030.03
  5. Step 5: Solve for x
    x = 729,329,030.03/28,313.40
  6. Step 6: Final answer
    x = 25,759.15

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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.