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Finding the Fourth Proportional to 19,265.85, 28,904.95 and 8,181.85

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Solution

The fourth proportional to 19,265.85, 28,904.95 and 8,181.85 is: 12,275.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,265.85 : 28,904.95 = 8,181.85 : x
  2. Step 2: Convert to fraction form
    19,265.85/28,904.95 = 8,181.85/x
  3. Step 3: Cross multiply
    19,265.85x = 28,904.95 × 8,181.85
  4. Step 4: Simplify right side
    19,265.85x = 236,495,965.16
  5. Step 5: Solve for x
    x = 236,495,965.16/19,265.85
  6. Step 6: Final answer
    x = 12,275.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.