Home / 28,253.12-38,991.68-15,677.60

Finding the Fourth Proportional to 28,253.12, 38,991.68 and 15,677.60

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Solution

The fourth proportional to 28,253.12, 38,991.68 and 15,677.60 is: 21,636.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.12 : 38,991.68 = 15,677.60 : x
  2. Step 2: Convert to fraction form
    28,253.12/38,991.68 = 15,677.60/x
  3. Step 3: Cross multiply
    28,253.12x = 38,991.68 × 15,677.60
  4. Step 4: Simplify right side
    28,253.12x = 611,295,962.37
  5. Step 5: Solve for x
    x = 611,295,962.37/28,253.12
  6. Step 6: Final answer
    x = 21,636.41

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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.