Home / 15,811.85-21,795.01-10,705.75

Finding the Fourth Proportional to 15,811.85, 21,795.01 and 10,705.75

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Solution

The fourth proportional to 15,811.85, 21,795.01 and 10,705.75 is: 14,756.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.85 : 21,795.01 = 10,705.75 : x
  2. Step 2: Convert to fraction form
    15,811.85/21,795.01 = 10,705.75/x
  3. Step 3: Cross multiply
    15,811.85x = 21,795.01 × 10,705.75
  4. Step 4: Simplify right side
    15,811.85x = 233,331,928.31
  5. Step 5: Solve for x
    x = 233,331,928.31/15,811.85
  6. Step 6: Final answer
    x = 14,756.78

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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.