Home / 28,358.43-39,135.92-15,783.99

Finding the Fourth Proportional to 28,358.43, 39,135.92 and 15,783.99

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Solution

The fourth proportional to 28,358.43, 39,135.92 and 15,783.99 is: 21,782.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.43 : 39,135.92 = 15,783.99 : x
  2. Step 2: Convert to fraction form
    28,358.43/39,135.92 = 15,783.99/x
  3. Step 3: Cross multiply
    28,358.43x = 39,135.92 × 15,783.99
  4. Step 4: Simplify right side
    28,358.43x = 617,720,969.92
  5. Step 5: Solve for x
    x = 617,720,969.92/28,358.43
  6. Step 6: Final answer
    x = 21,782.62

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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.