Home / 28,180.70-38,889.35-15,605.45

Finding the Fourth Proportional to 28,180.70, 38,889.35 and 15,605.45

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Solution

The fourth proportional to 28,180.70, 38,889.35 and 15,605.45 is: 21,535.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.70 : 38,889.35 = 15,605.45 : x
  2. Step 2: Convert to fraction form
    28,180.70/38,889.35 = 15,605.45/x
  3. Step 3: Cross multiply
    28,180.70x = 38,889.35 × 15,605.45
  4. Step 4: Simplify right side
    28,180.70x = 606,885,534.48
  5. Step 5: Solve for x
    x = 606,885,534.48/28,180.70
  6. Step 6: Final answer
    x = 21,535.51

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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.