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Finding the Fourth Proportional to 26,460, 39,670.48 and 12,618.72

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Solution

The fourth proportional to 26,460, 39,670.48 and 12,618.72 is: 18,918.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,460 : 39,670.48 = 12,618.72 : x
  2. Step 2: Convert to fraction form
    26,460/39,670.48 = 12,618.72/x
  3. Step 3: Cross multiply
    26,460x = 39,670.48 × 12,618.72
  4. Step 4: Simplify right side
    26,460x = 500,590,679.39
  5. Step 5: Solve for x
    x = 500,590,679.39/26,460
  6. Step 6: Final answer
    x = 18,918.77

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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.