Home / 27,581.81-38,064.35-20,855.88

Finding the Fourth Proportional to 27,581.81, 38,064.35 and 20,855.88

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Solution

The fourth proportional to 27,581.81, 38,064.35 and 20,855.88 is: 28,782.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,581.81 : 38,064.35 = 20,855.88 : x
  2. Step 2: Convert to fraction form
    27,581.81/38,064.35 = 20,855.88/x
  3. Step 3: Cross multiply
    27,581.81x = 38,064.35 × 20,855.88
  4. Step 4: Simplify right side
    27,581.81x = 793,865,411.60
  5. Step 5: Solve for x
    x = 793,865,411.60/27,581.81
  6. Step 6: Final answer
    x = 28,782.21

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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.