Home / 21,465.18-29,621.40-11,905.02

Finding the Fourth Proportional to 21,465.18, 29,621.40 and 11,905.02

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Solution

The fourth proportional to 21,465.18, 29,621.40 and 11,905.02 is: 16,428.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,465.18 : 29,621.40 = 11,905.02 : x
  2. Step 2: Convert to fraction form
    21,465.18/29,621.40 = 11,905.02/x
  3. Step 3: Cross multiply
    21,465.18x = 29,621.40 × 11,905.02
  4. Step 4: Simplify right side
    21,465.18x = 352,643,359.43
  5. Step 5: Solve for x
    x = 352,643,359.43/21,465.18
  6. Step 6: Final answer
    x = 16,428.62

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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.