Home / 28,486.77-39,309.71-15,739.81

Finding the Fourth Proportional to 28,486.77, 39,309.71 and 15,739.81

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Solution

The fourth proportional to 28,486.77, 39,309.71 and 15,739.81 is: 21,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.77 : 39,309.71 = 15,739.81 : x
  2. Step 2: Convert to fraction form
    28,486.77/39,309.71 = 15,739.81/x
  3. Step 3: Cross multiply
    28,486.77x = 39,309.71 × 15,739.81
  4. Step 4: Simplify right side
    28,486.77x = 618,727,189.58
  5. Step 5: Solve for x
    x = 618,727,189.58/28,486.77
  6. Step 6: Final answer
    x = 21,719.81

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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.