Home / 21,210.54-29,285.19-13,256.34

Finding the Fourth Proportional to 21,210.54, 29,285.19 and 13,256.34

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Solution

The fourth proportional to 21,210.54, 29,285.19 and 13,256.34 is: 18,302.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.54 : 29,285.19 = 13,256.34 : x
  2. Step 2: Convert to fraction form
    21,210.54/29,285.19 = 13,256.34/x
  3. Step 3: Cross multiply
    21,210.54x = 29,285.19 × 13,256.34
  4. Step 4: Simplify right side
    21,210.54x = 388,214,435.60
  5. Step 5: Solve for x
    x = 388,214,435.60/21,210.54
  6. Step 6: Final answer
    x = 18,302.90

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Similar ratio
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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.