Home / 28,358.87-39,134.58-15,783.35

Finding the Fourth Proportional to 28,358.87, 39,134.58 and 15,783.35

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Solution

The fourth proportional to 28,358.87, 39,134.58 and 15,783.35 is: 21,780.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.87 : 39,134.58 = 15,783.35 : x
  2. Step 2: Convert to fraction form
    28,358.87/39,134.58 = 15,783.35/x
  3. Step 3: Cross multiply
    28,358.87x = 39,134.58 × 15,783.35
  4. Step 4: Simplify right side
    28,358.87x = 617,674,694.33
  5. Step 5: Solve for x
    x = 617,674,694.33/28,358.87
  6. Step 6: Final answer
    x = 21,780.65

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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.