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Finding the Fourth Proportional to 18,973.01, 28,466.90 and 7,876.88

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Solution

The fourth proportional to 18,973.01, 28,466.90 and 7,876.88 is: 11,818.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.01 : 28,466.90 = 7,876.88 : x
  2. Step 2: Convert to fraction form
    18,973.01/28,466.90 = 7,876.88/x
  3. Step 3: Cross multiply
    18,973.01x = 28,466.90 × 7,876.88
  4. Step 4: Simplify right side
    18,973.01x = 224,230,173.55
  5. Step 5: Solve for x
    x = 224,230,173.55/18,973.01
  6. Step 6: Final answer
    x = 11,818.38

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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.