Home / 28,145.30-38,839.97-15,570.05

Finding the Fourth Proportional to 28,145.30, 38,839.97 and 15,570.05

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Solution

The fourth proportional to 28,145.30, 38,839.97 and 15,570.05 is: 21,486.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.30 : 38,839.97 = 15,570.05 : x
  2. Step 2: Convert to fraction form
    28,145.30/38,839.97 = 15,570.05/x
  3. Step 3: Cross multiply
    28,145.30x = 38,839.97 × 15,570.05
  4. Step 4: Simplify right side
    28,145.30x = 604,740,002.85
  5. Step 5: Solve for x
    x = 604,740,002.85/28,145.30
  6. Step 6: Final answer
    x = 21,486.36

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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.