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Finding the Fourth Proportional to 21,324, 29,426.48 and 12,370.90

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Solution

The fourth proportional to 21,324, 29,426.48 and 12,370.90 is: 17,071.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324 : 29,426.48 = 12,370.90 : x
  2. Step 2: Convert to fraction form
    21,324/29,426.48 = 12,370.90/x
  3. Step 3: Cross multiply
    21,324x = 29,426.48 × 12,370.90
  4. Step 4: Simplify right side
    21,324x = 364,032,041.43
  5. Step 5: Solve for x
    x = 364,032,041.43/21,324
  6. Step 6: Final answer
    x = 17,071.47

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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.