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Finding the Fourth Proportional to 14,477.76, 19,978.92 and 8,190

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Solution

The fourth proportional to 14,477.76, 19,978.92 and 8,190 is: 11,301.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,477.76 : 19,978.92 = 8,190 : x
  2. Step 2: Convert to fraction form
    14,477.76/19,978.92 = 8,190/x
  3. Step 3: Cross multiply
    14,477.76x = 19,978.92 × 8,190
  4. Step 4: Simplify right side
    14,477.76x = 163,627,354.80
  5. Step 5: Solve for x
    x = 163,627,354.80/14,477.76
  6. Step 6: Final answer
    x = 11,301.98

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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.