Home / 28,407.88-39,203.16-15,661.58

Finding the Fourth Proportional to 28,407.88, 39,203.16 and 15,661.58

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Solution

The fourth proportional to 28,407.88, 39,203.16 and 15,661.58 is: 21,613.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.88 : 39,203.16 = 15,661.58 : x
  2. Step 2: Convert to fraction form
    28,407.88/39,203.16 = 15,661.58/x
  3. Step 3: Cross multiply
    28,407.88x = 39,203.16 × 15,661.58
  4. Step 4: Simplify right side
    28,407.88x = 613,983,152.27
  5. Step 5: Solve for x
    x = 613,983,152.27/28,407.88
  6. Step 6: Final answer
    x = 21,613.13

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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.