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Finding the Fourth Proportional to 13,012.64, 19,521 and 4,245.54

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Solution

The fourth proportional to 13,012.64, 19,521 and 4,245.54 is: 6,368.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,012.64 : 19,521 = 4,245.54 : x
  2. Step 2: Convert to fraction form
    13,012.64/19,521 = 4,245.54/x
  3. Step 3: Cross multiply
    13,012.64x = 19,521 × 4,245.54
  4. Step 4: Simplify right side
    13,012.64x = 82,877,186.34
  5. Step 5: Solve for x
    x = 82,877,186.34/13,012.64
  6. Step 6: Final answer
    x = 6,368.98

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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.