Home / 28,106.68-38,786.88-15,531.16

Finding the Fourth Proportional to 28,106.68, 38,786.88 and 15,531.16

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Solution

The fourth proportional to 28,106.68, 38,786.88 and 15,531.16 is: 21,432.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.68 : 38,786.88 = 15,531.16 : x
  2. Step 2: Convert to fraction form
    28,106.68/38,786.88 = 15,531.16/x
  3. Step 3: Cross multiply
    28,106.68x = 38,786.88 × 15,531.16
  4. Step 4: Simplify right side
    28,106.68x = 602,405,239.18
  5. Step 5: Solve for x
    x = 602,405,239.18/28,106.68
  6. Step 6: Final answer
    x = 21,432.81

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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.