Home / 28,549.81-39,398.79-15,803.88

Finding the Fourth Proportional to 28,549.81, 39,398.79 and 15,803.88

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Solution

The fourth proportional to 28,549.81, 39,398.79 and 15,803.88 is: 21,809.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,549.81 : 39,398.79 = 15,803.88 : x
  2. Step 2: Convert to fraction form
    28,549.81/39,398.79 = 15,803.88/x
  3. Step 3: Cross multiply
    28,549.81x = 39,398.79 × 15,803.88
  4. Step 4: Simplify right side
    28,549.81x = 622,653,749.31
  5. Step 5: Solve for x
    x = 622,653,749.31/28,549.81
  6. Step 6: Final answer
    x = 21,809.38

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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.