Home / 21,931.96-30,266.86-11,995.96

Finding the Fourth Proportional to 21,931.96, 30,266.86 and 11,995.96

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Solution

The fourth proportional to 21,931.96, 30,266.86 and 11,995.96 is: 16,554.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.96 : 30,266.86 = 11,995.96 : x
  2. Step 2: Convert to fraction form
    21,931.96/30,266.86 = 11,995.96/x
  3. Step 3: Cross multiply
    21,931.96x = 30,266.86 × 11,995.96
  4. Step 4: Simplify right side
    21,931.96x = 363,080,041.89
  5. Step 5: Solve for x
    x = 363,080,041.89/21,931.96
  6. Step 6: Final answer
    x = 16,554.84

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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.