Home / 28,486.74-39,313.68-15,740.30

Finding the Fourth Proportional to 28,486.74, 39,313.68 and 15,740.30

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Solution

The fourth proportional to 28,486.74, 39,313.68 and 15,740.30 is: 21,722.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.74 : 39,313.68 = 15,740.30 : x
  2. Step 2: Convert to fraction form
    28,486.74/39,313.68 = 15,740.30/x
  3. Step 3: Cross multiply
    28,486.74x = 39,313.68 × 15,740.30
  4. Step 4: Simplify right side
    28,486.74x = 618,809,117.30
  5. Step 5: Solve for x
    x = 618,809,117.30/28,486.74
  6. Step 6: Final answer
    x = 21,722.71

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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.