Home / 28,530.80-39,382.40-19,607.84

Finding the Fourth Proportional to 28,530.80, 39,382.40 and 19,607.84

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Solution

The fourth proportional to 28,530.80, 39,382.40 and 19,607.84 is: 27,065.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.80 : 39,382.40 = 19,607.84 : x
  2. Step 2: Convert to fraction form
    28,530.80/39,382.40 = 19,607.84/x
  3. Step 3: Cross multiply
    28,530.80x = 39,382.40 × 19,607.84
  4. Step 4: Simplify right side
    28,530.80x = 772,203,798.02
  5. Step 5: Solve for x
    x = 772,203,798.02/28,530.80
  6. Step 6: Final answer
    x = 27,065.62

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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.