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Finding the Fourth Proportional to 21,296.40, 29,389.32 and 12,344.40

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Solution

The fourth proportional to 21,296.40, 29,389.32 and 12,344.40 is: 17,035.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,296.40 : 29,389.32 = 12,344.40 : x
  2. Step 2: Convert to fraction form
    21,296.40/29,389.32 = 12,344.40/x
  3. Step 3: Cross multiply
    21,296.40x = 29,389.32 × 12,344.40
  4. Step 4: Simplify right side
    21,296.40x = 362,793,521.81
  5. Step 5: Solve for x
    x = 362,793,521.81/21,296.40
  6. Step 6: Final answer
    x = 17,035.44

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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.