Home / 21,029.28-31,506.80-18,741.12

Finding the Fourth Proportional to 21,029.28, 31,506.80 and 18,741.12

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Solution

The fourth proportional to 21,029.28, 31,506.80 and 18,741.12 is: 28,078.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.28 : 31,506.80 = 18,741.12 : x
  2. Step 2: Convert to fraction form
    21,029.28/31,506.80 = 18,741.12/x
  3. Step 3: Cross multiply
    21,029.28x = 31,506.80 × 18,741.12
  4. Step 4: Simplify right side
    21,029.28x = 590,472,719.62
  5. Step 5: Solve for x
    x = 590,472,719.62/21,029.28
  6. Step 6: Final answer
    x = 28,078.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.