Home / 20,318.24-30,407.54-12,818.35

Finding the Fourth Proportional to 20,318.24, 30,407.54 and 12,818.35

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Solution

The fourth proportional to 20,318.24, 30,407.54 and 12,818.35 is: 19,183.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.24 : 30,407.54 = 12,818.35 : x
  2. Step 2: Convert to fraction form
    20,318.24/30,407.54 = 12,818.35/x
  3. Step 3: Cross multiply
    20,318.24x = 30,407.54 × 12,818.35
  4. Step 4: Simplify right side
    20,318.24x = 389,774,518.35
  5. Step 5: Solve for x
    x = 389,774,518.35/20,318.24
  6. Step 6: Final answer
    x = 19,183.48

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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.