Home / 28,220.96-38,945.67-15,955.40

Finding the Fourth Proportional to 28,220.96, 38,945.67 and 15,955.40

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Solution

The fourth proportional to 28,220.96, 38,945.67 and 15,955.40 is: 22,018.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.96 : 38,945.67 = 15,955.40 : x
  2. Step 2: Convert to fraction form
    28,220.96/38,945.67 = 15,955.40/x
  3. Step 3: Cross multiply
    28,220.96x = 38,945.67 × 15,955.40
  4. Step 4: Simplify right side
    28,220.96x = 621,393,548.39
  5. Step 5: Solve for x
    x = 621,393,548.39/28,220.96
  6. Step 6: Final answer
    x = 22,018.87

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Double scale
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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.