Home / 28,189.39-38,901.37-15,443.03

Finding the Fourth Proportional to 28,189.39, 38,901.37 and 15,443.03

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Solution

The fourth proportional to 28,189.39, 38,901.37 and 15,443.03 is: 21,311.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.39 : 38,901.37 = 15,443.03 : x
  2. Step 2: Convert to fraction form
    28,189.39/38,901.37 = 15,443.03/x
  3. Step 3: Cross multiply
    28,189.39x = 38,901.37 × 15,443.03
  4. Step 4: Simplify right side
    28,189.39x = 600,755,038.61
  5. Step 5: Solve for x
    x = 600,755,038.61/28,189.39
  6. Step 6: Final answer
    x = 21,311.39

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Half scale
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Double scale
Find fourth proportional to 28,190.39, 38,902.75 and 15,444.03
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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.