Home / 21,890.08-30,208.52-12,459.28

Finding the Fourth Proportional to 21,890.08, 30,208.52 and 12,459.28

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Solution

The fourth proportional to 21,890.08, 30,208.52 and 12,459.28 is: 17,193.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.08 : 30,208.52 = 12,459.28 : x
  2. Step 2: Convert to fraction form
    21,890.08/30,208.52 = 12,459.28/x
  3. Step 3: Cross multiply
    21,890.08x = 30,208.52 × 12,459.28
  4. Step 4: Simplify right side
    21,890.08x = 376,376,409.07
  5. Step 5: Solve for x
    x = 376,376,409.07/21,890.08
  6. Step 6: Final answer
    x = 17,193.93

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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.