Home / 28,686.32-39,587.63-15,940.68

Finding the Fourth Proportional to 28,686.32, 39,587.63 and 15,940.68

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Solution

The fourth proportional to 28,686.32, 39,587.63 and 15,940.68 is: 21,998.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.32 : 39,587.63 = 15,940.68 : x
  2. Step 2: Convert to fraction form
    28,686.32/39,587.63 = 15,940.68/x
  3. Step 3: Cross multiply
    28,686.32x = 39,587.63 × 15,940.68
  4. Step 4: Simplify right side
    28,686.32x = 631,053,741.79
  5. Step 5: Solve for x
    x = 631,053,741.79/28,686.32
  6. Step 6: Final answer
    x = 21,998.42

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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.