Home / 28,130.82-38,803.57-18,570.78

Finding the Fourth Proportional to 28,130.82, 38,803.57 and 18,570.78

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Solution

The fourth proportional to 28,130.82, 38,803.57 and 18,570.78 is: 25,616.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.82 : 38,803.57 = 18,570.78 : x
  2. Step 2: Convert to fraction form
    28,130.82/38,803.57 = 18,570.78/x
  3. Step 3: Cross multiply
    28,130.82x = 38,803.57 × 18,570.78
  4. Step 4: Simplify right side
    28,130.82x = 720,612,561.68
  5. Step 5: Solve for x
    x = 720,612,561.68/28,130.82
  6. Step 6: Final answer
    x = 25,616.48

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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.