Home / 15,235.12-21,018.28-9,928

Finding the Fourth Proportional to 15,235.12, 21,018.28 and 9,928

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Solution

The fourth proportional to 15,235.12, 21,018.28 and 9,928 is: 13,696.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,235.12 : 21,018.28 = 9,928 : x
  2. Step 2: Convert to fraction form
    15,235.12/21,018.28 = 9,928/x
  3. Step 3: Cross multiply
    15,235.12x = 21,018.28 × 9,928
  4. Step 4: Simplify right side
    15,235.12x = 208,669,483.84
  5. Step 5: Solve for x
    x = 208,669,483.84/15,235.12
  6. Step 6: Final answer
    x = 13,696.61

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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.