Home / 28,397.86-39,188.81-15,651.56

Finding the Fourth Proportional to 28,397.86, 39,188.81 and 15,651.56

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Solution

The fourth proportional to 28,397.86, 39,188.81 and 15,651.56 is: 21,599.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,397.86 : 39,188.81 = 15,651.56 : x
  2. Step 2: Convert to fraction form
    28,397.86/39,188.81 = 15,651.56/x
  3. Step 3: Cross multiply
    28,397.86x = 39,188.81 × 15,651.56
  4. Step 4: Simplify right side
    28,397.86x = 613,366,148.14
  5. Step 5: Solve for x
    x = 613,366,148.14/28,397.86
  6. Step 6: Final answer
    x = 21,599.03

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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.