Home / 28,003.68-38,645.10-15,428.43

Finding the Fourth Proportional to 28,003.68, 38,645.10 and 15,428.43

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Solution

The fourth proportional to 28,003.68, 38,645.10 and 15,428.43 is: 21,291.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003.68 : 38,645.10 = 15,428.43 : x
  2. Step 2: Convert to fraction form
    28,003.68/38,645.10 = 15,428.43/x
  3. Step 3: Cross multiply
    28,003.68x = 38,645.10 × 15,428.43
  4. Step 4: Simplify right side
    28,003.68x = 596,233,220.19
  5. Step 5: Solve for x
    x = 596,233,220.19/28,003.68
  6. Step 6: Final answer
    x = 21,291.25

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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.