Home / 28,143.80-38,837.90-15,568.55

Finding the Fourth Proportional to 28,143.80, 38,837.90 and 15,568.55

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Solution

The fourth proportional to 28,143.80, 38,837.90 and 15,568.55 is: 21,484.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.80 : 38,837.90 = 15,568.55 : x
  2. Step 2: Convert to fraction form
    28,143.80/38,837.90 = 15,568.55/x
  3. Step 3: Cross multiply
    28,143.80x = 38,837.90 × 15,568.55
  4. Step 4: Simplify right side
    28,143.80x = 604,649,632.78
  5. Step 5: Solve for x
    x = 604,649,632.78/28,143.80
  6. Step 6: Final answer
    x = 21,484.30

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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.