Home / 15,518.42-21,415.87-8,445.30

Finding the Fourth Proportional to 15,518.42, 21,415.87 and 8,445.30

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Solution

The fourth proportional to 15,518.42, 21,415.87 and 8,445.30 is: 11,654.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.42 : 21,415.87 = 8,445.30 : x
  2. Step 2: Convert to fraction form
    15,518.42/21,415.87 = 8,445.30/x
  3. Step 3: Cross multiply
    15,518.42x = 21,415.87 × 8,445.30
  4. Step 4: Simplify right side
    15,518.42x = 180,863,446.91
  5. Step 5: Solve for x
    x = 180,863,446.91/15,518.42
  6. Step 6: Final answer
    x = 11,654.76

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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.