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Finding the Fourth Proportional to 19,368.64, 29,058 and 5,518.72

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Solution

The fourth proportional to 19,368.64, 29,058 and 5,518.72 is: 8,279.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,368.64 : 29,058 = 5,518.72 : x
  2. Step 2: Convert to fraction form
    19,368.64/29,058 = 5,518.72/x
  3. Step 3: Cross multiply
    19,368.64x = 29,058 × 5,518.72
  4. Step 4: Simplify right side
    19,368.64x = 160,362,965.76
  5. Step 5: Solve for x
    x = 160,362,965.76/19,368.64
  6. Step 6: Final answer
    x = 8,279.52

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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.