Home / 21,301.92-29,389.68-12,915.36

Finding the Fourth Proportional to 21,301.92, 29,389.68 and 12,915.36

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Solution

The fourth proportional to 21,301.92, 29,389.68 and 12,915.36 is: 17,818.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,301.92 : 29,389.68 = 12,915.36 : x
  2. Step 2: Convert to fraction form
    21,301.92/29,389.68 = 12,915.36/x
  3. Step 3: Cross multiply
    21,301.92x = 29,389.68 × 12,915.36
  4. Step 4: Simplify right side
    21,301.92x = 379,578,297.48
  5. Step 5: Solve for x
    x = 379,578,297.48/21,301.92
  6. Step 6: Final answer
    x = 17,818.97

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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.