Home / 21,485.32-29,622.36-13,918.36

Finding the Fourth Proportional to 21,485.32, 29,622.36 and 13,918.36

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Solution

The fourth proportional to 21,485.32, 29,622.36 and 13,918.36 is: 19,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,485.32 : 29,622.36 = 13,918.36 : x
  2. Step 2: Convert to fraction form
    21,485.32/29,622.36 = 13,918.36/x
  3. Step 3: Cross multiply
    21,485.32x = 29,622.36 × 13,918.36
  4. Step 4: Simplify right side
    21,485.32x = 412,294,670.53
  5. Step 5: Solve for x
    x = 412,294,670.53/21,485.32
  6. Step 6: Final answer
    x = 19,189.60

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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.