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Finding the Fourth Proportional to 28,482.62, 39,250.49 and 20,509.79

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Solution

The fourth proportional to 28,482.62, 39,250.49 and 20,509.79 is: 28,263.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,482.62 : 39,250.49 = 20,509.79 : x
  2. Step 2: Convert to fraction form
    28,482.62/39,250.49 = 20,509.79/x
  3. Step 3: Cross multiply
    28,482.62x = 39,250.49 × 20,509.79
  4. Step 4: Simplify right side
    28,482.62x = 805,019,008.50
  5. Step 5: Solve for x
    x = 805,019,008.50/28,482.62
  6. Step 6: Final answer
    x = 28,263.52

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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.