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Finding the Fourth Proportional to 19,230.65, 28,848.95 and 8,137.40

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Solution

The fourth proportional to 19,230.65, 28,848.95 and 8,137.40 is: 12,207.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,230.65 : 28,848.95 = 8,137.40 : x
  2. Step 2: Convert to fraction form
    19,230.65/28,848.95 = 8,137.40/x
  3. Step 3: Cross multiply
    19,230.65x = 28,848.95 × 8,137.40
  4. Step 4: Simplify right side
    19,230.65x = 234,755,405.04
  5. Step 5: Solve for x
    x = 234,755,405.04/19,230.65
  6. Step 6: Final answer
    x = 12,207.36

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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.