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Finding the Fourth Proportional to 15,703, 21,669.18 and 8,629.24

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Solution

The fourth proportional to 15,703, 21,669.18 and 8,629.24 is: 11,907.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703 : 21,669.18 = 8,629.24 : x
  2. Step 2: Convert to fraction form
    15,703/21,669.18 = 8,629.24/x
  3. Step 3: Cross multiply
    15,703x = 21,669.18 × 8,629.24
  4. Step 4: Simplify right side
    15,703x = 186,988,554.82
  5. Step 5: Solve for x
    x = 186,988,554.82/15,703
  6. Step 6: Final answer
    x = 11,907.82

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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.