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Finding the Fourth Proportional to 21,460.81, 29,615.08 and 11,901.08

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Solution

The fourth proportional to 21,460.81, 29,615.08 and 11,901.08 is: 16,423.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,460.81 : 29,615.08 = 11,901.08 : x
  2. Step 2: Convert to fraction form
    21,460.81/29,615.08 = 11,901.08/x
  3. Step 3: Cross multiply
    21,460.81x = 29,615.08 × 11,901.08
  4. Step 4: Simplify right side
    21,460.81x = 352,451,436.29
  5. Step 5: Solve for x
    x = 352,451,436.29/21,460.81
  6. Step 6: Final answer
    x = 16,423.03

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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.