Home / 21,299.92-29,386.92-12,913.36

Finding the Fourth Proportional to 21,299.92, 29,386.92 and 12,913.36

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Solution

The fourth proportional to 21,299.92, 29,386.92 and 12,913.36 is: 17,816.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.92 : 29,386.92 = 12,913.36 : x
  2. Step 2: Convert to fraction form
    21,299.92/29,386.92 = 12,913.36/x
  3. Step 3: Cross multiply
    21,299.92x = 29,386.92 × 12,913.36
  4. Step 4: Simplify right side
    21,299.92x = 379,483,877.25
  5. Step 5: Solve for x
    x = 379,483,877.25/21,299.92
  6. Step 6: Final answer
    x = 17,816.21

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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.