Home / 21,936.26-30,267.59-12,985.07

Finding the Fourth Proportional to 21,936.26, 30,267.59 and 12,985.07

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Solution

The fourth proportional to 21,936.26, 30,267.59 and 12,985.07 is: 17,916.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.26 : 30,267.59 = 12,985.07 : x
  2. Step 2: Convert to fraction form
    21,936.26/30,267.59 = 12,985.07/x
  3. Step 3: Cross multiply
    21,936.26x = 30,267.59 × 12,985.07
  4. Step 4: Simplify right side
    21,936.26x = 393,026,558.62
  5. Step 5: Solve for x
    x = 393,026,558.62/21,936.26
  6. Step 6: Final answer
    x = 17,916.76

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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.