Home / 21,328.47-29,427.37-13,775.11

Finding the Fourth Proportional to 21,328.47, 29,427.37 and 13,775.11

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Solution

The fourth proportional to 21,328.47, 29,427.37 and 13,775.11 is: 19,005.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.47 : 29,427.37 = 13,775.11 : x
  2. Step 2: Convert to fraction form
    21,328.47/29,427.37 = 13,775.11/x
  3. Step 3: Cross multiply
    21,328.47x = 29,427.37 × 13,775.11
  4. Step 4: Simplify right side
    21,328.47x = 405,365,150.75
  5. Step 5: Solve for x
    x = 405,365,150.75/21,328.47
  6. Step 6: Final answer
    x = 19,005.82

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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.