Home / 28,205.38-38,923.69-15,630.40

Finding the Fourth Proportional to 28,205.38, 38,923.69 and 15,630.40

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Solution

The fourth proportional to 28,205.38, 38,923.69 and 15,630.40 is: 21,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.38 : 38,923.69 = 15,630.40 : x
  2. Step 2: Convert to fraction form
    28,205.38/38,923.69 = 15,630.40/x
  3. Step 3: Cross multiply
    28,205.38x = 38,923.69 × 15,630.40
  4. Step 4: Simplify right side
    28,205.38x = 608,392,649.56
  5. Step 5: Solve for x
    x = 608,392,649.56/28,205.38
  6. Step 6: Final answer
    x = 21,570.10

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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.