Home / 28,215.81-38,917.13-20,266.20

Finding the Fourth Proportional to 28,215.81, 38,917.13 and 20,266.20

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Solution

The fourth proportional to 28,215.81, 38,917.13 and 20,266.20 is: 27,952.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.81 : 38,917.13 = 20,266.20 : x
  2. Step 2: Convert to fraction form
    28,215.81/38,917.13 = 20,266.20/x
  3. Step 3: Cross multiply
    28,215.81x = 38,917.13 × 20,266.20
  4. Step 4: Simplify right side
    28,215.81x = 788,702,238.68
  5. Step 5: Solve for x
    x = 788,702,238.68/28,215.81
  6. Step 6: Final answer
    x = 27,952.49

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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.