Home / 28,365.66-39,145.56-15,619.80

Finding the Fourth Proportional to 28,365.66, 39,145.56 and 15,619.80

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Solution

The fourth proportional to 28,365.66, 39,145.56 and 15,619.80 is: 21,555.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.66 : 39,145.56 = 15,619.80 : x
  2. Step 2: Convert to fraction form
    28,365.66/39,145.56 = 15,619.80/x
  3. Step 3: Cross multiply
    28,365.66x = 39,145.56 × 15,619.80
  4. Step 4: Simplify right side
    28,365.66x = 611,445,818.09
  5. Step 5: Solve for x
    x = 611,445,818.09/28,365.66
  6. Step 6: Final answer
    x = 21,555.85

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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.