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Finding the Fourth Proportional to 28,037.08, 38,690.08 and 15,939.15

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Solution

The fourth proportional to 28,037.08, 38,690.08 and 15,939.15 is: 21,995.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,037.08 : 38,690.08 = 15,939.15 : x
  2. Step 2: Convert to fraction form
    28,037.08/38,690.08 = 15,939.15/x
  3. Step 3: Cross multiply
    28,037.08x = 38,690.08 × 15,939.15
  4. Step 4: Simplify right side
    28,037.08x = 616,686,988.63
  5. Step 5: Solve for x
    x = 616,686,988.63/28,037.08
  6. Step 6: Final answer
    x = 21,995.41

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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.