Home / 21,321.54-29,407.86-15,654.51

Finding the Fourth Proportional to 21,321.54, 29,407.86 and 15,654.51

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Solution

The fourth proportional to 21,321.54, 29,407.86 and 15,654.51 is: 21,591.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.54 : 29,407.86 = 15,654.51 : x
  2. Step 2: Convert to fraction form
    21,321.54/29,407.86 = 15,654.51/x
  3. Step 3: Cross multiply
    21,321.54x = 29,407.86 × 15,654.51
  4. Step 4: Simplify right side
    21,321.54x = 460,365,638.45
  5. Step 5: Solve for x
    x = 460,365,638.45/21,321.54
  6. Step 6: Final answer
    x = 21,591.58

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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.