Home / 21,805.12-30,090.16-12,373.48

Finding the Fourth Proportional to 21,805.12, 30,090.16 and 12,373.48

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Solution

The fourth proportional to 21,805.12, 30,090.16 and 12,373.48 is: 17,074.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805.12 : 30,090.16 = 12,373.48 : x
  2. Step 2: Convert to fraction form
    21,805.12/30,090.16 = 12,373.48/x
  3. Step 3: Cross multiply
    21,805.12x = 30,090.16 × 12,373.48
  4. Step 4: Simplify right side
    21,805.12x = 372,319,992.96
  5. Step 5: Solve for x
    x = 372,319,992.96/21,805.12
  6. Step 6: Final answer
    x = 17,074.89

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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.