Home / 28,105.07-38,784.53-15,357.98

Finding the Fourth Proportional to 28,105.07, 38,784.53 and 15,357.98

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Solution

The fourth proportional to 28,105.07, 38,784.53 and 15,357.98 is: 21,193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.07 : 38,784.53 = 15,357.98 : x
  2. Step 2: Convert to fraction form
    28,105.07/38,784.53 = 15,357.98/x
  3. Step 3: Cross multiply
    28,105.07x = 38,784.53 × 15,357.98
  4. Step 4: Simplify right side
    28,105.07x = 595,651,765.34
  5. Step 5: Solve for x
    x = 595,651,765.34/28,105.07
  6. Step 6: Final answer
    x = 21,193.75

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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.