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Finding the Fourth Proportional to 15,068.15, 20,795.09 and 8,354.40

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Solution

The fourth proportional to 15,068.15, 20,795.09 and 8,354.40 is: 11,529.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,068.15 : 20,795.09 = 8,354.40 : x
  2. Step 2: Convert to fraction form
    15,068.15/20,795.09 = 8,354.40/x
  3. Step 3: Cross multiply
    15,068.15x = 20,795.09 × 8,354.40
  4. Step 4: Simplify right side
    15,068.15x = 173,730,458.12
  5. Step 5: Solve for x
    x = 173,730,458.12/15,068.15
  6. Step 6: Final answer
    x = 11,529.65

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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.