Home / 15,852.85-21,856.19-13,638.51

Finding the Fourth Proportional to 15,852.85, 21,856.19 and 13,638.51

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Solution

The fourth proportional to 15,852.85, 21,856.19 and 13,638.51 is: 18,803.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,852.85 : 21,856.19 = 13,638.51 : x
  2. Step 2: Convert to fraction form
    15,852.85/21,856.19 = 13,638.51/x
  3. Step 3: Cross multiply
    15,852.85x = 21,856.19 × 13,638.51
  4. Step 4: Simplify right side
    15,852.85x = 298,085,797.68
  5. Step 5: Solve for x
    x = 298,085,797.68/15,852.85
  6. Step 6: Final answer
    x = 18,803.30

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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.