Home / 28,490.52-39,315.06-15,743.64

Finding the Fourth Proportional to 28,490.52, 39,315.06 and 15,743.64

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Solution

The fourth proportional to 28,490.52, 39,315.06 and 15,743.64 is: 21,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.52 : 39,315.06 = 15,743.64 : x
  2. Step 2: Convert to fraction form
    28,490.52/39,315.06 = 15,743.64/x
  3. Step 3: Cross multiply
    28,490.52x = 39,315.06 × 15,743.64
  4. Step 4: Simplify right side
    28,490.52x = 618,962,151.22
  5. Step 5: Solve for x
    x = 618,962,151.22/28,490.52
  6. Step 6: Final answer
    x = 21,725.20

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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.