Home / 28,681.61-39,558.71-20,750.09

Finding the Fourth Proportional to 28,681.61, 39,558.71 and 20,750.09

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Solution

The fourth proportional to 28,681.61, 39,558.71 and 20,750.09 is: 28,619.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.61 : 39,558.71 = 20,750.09 : x
  2. Step 2: Convert to fraction form
    28,681.61/39,558.71 = 20,750.09/x
  3. Step 3: Cross multiply
    28,681.61x = 39,558.71 × 20,750.09
  4. Step 4: Simplify right side
    28,681.61x = 820,846,646.87
  5. Step 5: Solve for x
    x = 820,846,646.87/28,681.61
  6. Step 6: Final answer
    x = 28,619.27

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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.