Home / 28,380.16-39,178.65-17,775.64

Finding the Fourth Proportional to 28,380.16, 39,178.65 and 17,775.64

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Solution

The fourth proportional to 28,380.16, 39,178.65 and 17,775.64 is: 24,539.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.16 : 39,178.65 = 17,775.64 : x
  2. Step 2: Convert to fraction form
    28,380.16/39,178.65 = 17,775.64/x
  3. Step 3: Cross multiply
    28,380.16x = 39,178.65 × 17,775.64
  4. Step 4: Simplify right side
    28,380.16x = 696,425,578.09
  5. Step 5: Solve for x
    x = 696,425,578.09/28,380.16
  6. Step 6: Final answer
    x = 24,539.17

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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.