Home / 21,916.36-30,252.45-12,971.53

Finding the Fourth Proportional to 21,916.36, 30,252.45 and 12,971.53

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Solution

The fourth proportional to 21,916.36, 30,252.45 and 12,971.53 is: 17,905.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.36 : 30,252.45 = 12,971.53 : x
  2. Step 2: Convert to fraction form
    21,916.36/30,252.45 = 12,971.53/x
  3. Step 3: Cross multiply
    21,916.36x = 30,252.45 × 12,971.53
  4. Step 4: Simplify right side
    21,916.36x = 392,420,562.75
  5. Step 5: Solve for x
    x = 392,420,562.75/21,916.36
  6. Step 6: Final answer
    x = 17,905.37

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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.