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Finding the Fourth Proportional to 20,482.72, 28,264 and 11,530.08

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Solution

The fourth proportional to 20,482.72, 28,264 and 11,530.08 is: 15,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,482.72 : 28,264 = 11,530.08 : x
  2. Step 2: Convert to fraction form
    20,482.72/28,264 = 11,530.08/x
  3. Step 3: Cross multiply
    20,482.72x = 28,264 × 11,530.08
  4. Step 4: Simplify right side
    20,482.72x = 325,886,181.12
  5. Step 5: Solve for x
    x = 325,886,181.12/20,482.72
  6. Step 6: Final answer
    x = 15,910.30

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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.