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Finding the Fourth Proportional to 14,353.86, 19,808.60 and 7,980.98

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Solution

The fourth proportional to 14,353.86, 19,808.60 and 7,980.98 is: 11,013.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,353.86 : 19,808.60 = 7,980.98 : x
  2. Step 2: Convert to fraction form
    14,353.86/19,808.60 = 7,980.98/x
  3. Step 3: Cross multiply
    14,353.86x = 19,808.60 × 7,980.98
  4. Step 4: Simplify right side
    14,353.86x = 158,092,040.43
  5. Step 5: Solve for x
    x = 158,092,040.43/14,353.86
  6. Step 6: Final answer
    x = 11,013.90

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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.