Home / 28,003.32-38,644.70-15,428.07

Finding the Fourth Proportional to 28,003.32, 38,644.70 and 15,428.07

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Solution

The fourth proportional to 28,003.32, 38,644.70 and 15,428.07 is: 21,290.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003.32 : 38,644.70 = 15,428.07 : x
  2. Step 2: Convert to fraction form
    28,003.32/38,644.70 = 15,428.07/x
  3. Step 3: Cross multiply
    28,003.32x = 38,644.70 × 15,428.07
  4. Step 4: Simplify right side
    28,003.32x = 596,213,059.59
  5. Step 5: Solve for x
    x = 596,213,059.59/28,003.32
  6. Step 6: Final answer
    x = 21,290.80

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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.