Home / 28,176.80-38,881.89-15,427.19

Finding the Fourth Proportional to 28,176.80, 38,881.89 and 15,427.19

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Solution

The fourth proportional to 28,176.80, 38,881.89 and 15,427.19 is: 21,288.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,176.80 : 38,881.89 = 15,427.19 : x
  2. Step 2: Convert to fraction form
    28,176.80/38,881.89 = 15,427.19/x
  3. Step 3: Cross multiply
    28,176.80x = 38,881.89 × 15,427.19
  4. Step 4: Simplify right side
    28,176.80x = 599,838,401.79
  5. Step 5: Solve for x
    x = 599,838,401.79/28,176.80
  6. Step 6: Final answer
    x = 21,288.38

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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.