Home / 28,135.08-38,825.97-15,387.98

Finding the Fourth Proportional to 28,135.08, 38,825.97 and 15,387.98

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Solution

The fourth proportional to 28,135.08, 38,825.97 and 15,387.98 is: 21,235.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.08 : 38,825.97 = 15,387.98 : x
  2. Step 2: Convert to fraction form
    28,135.08/38,825.97 = 15,387.98/x
  3. Step 3: Cross multiply
    28,135.08x = 38,825.97 × 15,387.98
  4. Step 4: Simplify right side
    28,135.08x = 597,453,055.71
  5. Step 5: Solve for x
    x = 597,453,055.71/28,135.08
  6. Step 6: Final answer
    x = 21,235.16

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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.