Home / 21,148.08-29,185.56-12,765.84

Finding the Fourth Proportional to 21,148.08, 29,185.56 and 12,765.84

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Solution

The fourth proportional to 21,148.08, 29,185.56 and 12,765.84 is: 17,617.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.08 : 29,185.56 = 12,765.84 : x
  2. Step 2: Convert to fraction form
    21,148.08/29,185.56 = 12,765.84/x
  3. Step 3: Cross multiply
    21,148.08x = 29,185.56 × 12,765.84
  4. Step 4: Simplify right side
    21,148.08x = 372,578,189.27
  5. Step 5: Solve for x
    x = 372,578,189.27/21,148.08
  6. Step 6: Final answer
    x = 17,617.59

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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.