Home / 21,281.36-29,367-12,328.25

Finding the Fourth Proportional to 21,281.36, 29,367 and 12,328.25

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Solution

The fourth proportional to 21,281.36, 29,367 and 12,328.25 is: 17,012.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.36 : 29,367 = 12,328.25 : x
  2. Step 2: Convert to fraction form
    21,281.36/29,367 = 12,328.25/x
  3. Step 3: Cross multiply
    21,281.36x = 29,367 × 12,328.25
  4. Step 4: Simplify right side
    21,281.36x = 362,043,570.92
  5. Step 5: Solve for x
    x = 362,043,570.92/21,281.36
  6. Step 6: Final answer
    x = 17,012.24

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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.