Home / 28,020.70-38,668.53-15,445.45

Finding the Fourth Proportional to 28,020.70, 38,668.53 and 15,445.45

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Solution

The fourth proportional to 28,020.70, 38,668.53 and 15,445.45 is: 21,314.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020.70 : 38,668.53 = 15,445.45 : x
  2. Step 2: Convert to fraction form
    28,020.70/38,668.53 = 15,445.45/x
  3. Step 3: Cross multiply
    28,020.70x = 38,668.53 × 15,445.45
  4. Step 4: Simplify right side
    28,020.70x = 597,252,846.69
  5. Step 5: Solve for x
    x = 597,252,846.69/28,020.70
  6. Step 6: Final answer
    x = 21,314.70

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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.