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Finding the Fourth Proportional to 15,804.29, 21,812.01 and 15,285.03

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Solution

The fourth proportional to 15,804.29, 21,812.01 and 15,285.03 is: 21,095.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,804.29 : 21,812.01 = 15,285.03 : x
  2. Step 2: Convert to fraction form
    15,804.29/21,812.01 = 15,285.03/x
  3. Step 3: Cross multiply
    15,804.29x = 21,812.01 × 15,285.03
  4. Step 4: Simplify right side
    15,804.29x = 333,397,227.21
  5. Step 5: Solve for x
    x = 333,397,227.21/15,804.29
  6. Step 6: Final answer
    x = 21,095.37

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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.