Home / 28,412.16-39,209.28-15,836.64

Finding the Fourth Proportional to 28,412.16, 39,209.28 and 15,836.64

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Solution

The fourth proportional to 28,412.16, 39,209.28 and 15,836.64 is: 21,854.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,412.16 : 39,209.28 = 15,836.64 : x
  2. Step 2: Convert to fraction form
    28,412.16/39,209.28 = 15,836.64/x
  3. Step 3: Cross multiply
    28,412.16x = 39,209.28 × 15,836.64
  4. Step 4: Simplify right side
    28,412.16x = 620,943,252.02
  5. Step 5: Solve for x
    x = 620,943,252.02/28,412.16
  6. Step 6: Final answer
    x = 21,854.84

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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.