Home / 20,518.10-30,712.35-16,111.70

Finding the Fourth Proportional to 20,518.10, 30,712.35 and 16,111.70

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Solution

The fourth proportional to 20,518.10, 30,712.35 and 16,111.70 is: 24,116.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.10 : 30,712.35 = 16,111.70 : x
  2. Step 2: Convert to fraction form
    20,518.10/30,712.35 = 16,111.70/x
  3. Step 3: Cross multiply
    20,518.10x = 30,712.35 × 16,111.70
  4. Step 4: Simplify right side
    20,518.10x = 494,828,169.50
  5. Step 5: Solve for x
    x = 494,828,169.50/20,518.10
  6. Step 6: Final answer
    x = 24,116.67

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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.