Home / 20,351.66-30,502.88-10,485.55

Finding the Fourth Proportional to 20,351.66, 30,502.88 and 10,485.55

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Solution

The fourth proportional to 20,351.66, 30,502.88 and 10,485.55 is: 15,715.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.66 : 30,502.88 = 10,485.55 : x
  2. Step 2: Convert to fraction form
    20,351.66/30,502.88 = 10,485.55/x
  3. Step 3: Cross multiply
    20,351.66x = 30,502.88 × 10,485.55
  4. Step 4: Simplify right side
    20,351.66x = 319,839,420.96
  5. Step 5: Solve for x
    x = 319,839,420.96/20,351.66
  6. Step 6: Final answer
    x = 15,715.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.