Home / 28,142.40-38,836.80-15,566.40

Finding the Fourth Proportional to 28,142.40, 38,836.80 and 15,566.40

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Solution

The fourth proportional to 28,142.40, 38,836.80 and 15,566.40 is: 21,481.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.40 : 38,836.80 = 15,566.40 : x
  2. Step 2: Convert to fraction form
    28,142.40/38,836.80 = 15,566.40/x
  3. Step 3: Cross multiply
    28,142.40x = 38,836.80 × 15,566.40
  4. Step 4: Simplify right side
    28,142.40x = 604,549,163.52
  5. Step 5: Solve for x
    x = 604,549,163.52/28,142.40
  6. Step 6: Final answer
    x = 21,481.79

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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.