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Finding the Fourth Proportional to 20,894.76, 28,848.42 and 12,948.66

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Solution

The fourth proportional to 20,894.76, 28,848.42 and 12,948.66 is: 17,877.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.76 : 28,848.42 = 12,948.66 : x
  2. Step 2: Convert to fraction form
    20,894.76/28,848.42 = 12,948.66/x
  3. Step 3: Cross multiply
    20,894.76x = 28,848.42 × 12,948.66
  4. Step 4: Simplify right side
    20,894.76x = 373,548,382.12
  5. Step 5: Solve for x
    x = 373,548,382.12/20,894.76
  6. Step 6: Final answer
    x = 17,877.61

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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.