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Finding the Fourth Proportional to 12,870, 19,307.88 and 4,549.92

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Solution

The fourth proportional to 12,870, 19,307.88 and 4,549.92 is: 6,825.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,870 : 19,307.88 = 4,549.92 : x
  2. Step 2: Convert to fraction form
    12,870/19,307.88 = 4,549.92/x
  3. Step 3: Cross multiply
    12,870x = 19,307.88 × 4,549.92
  4. Step 4: Simplify right side
    12,870x = 87,849,309.37
  5. Step 5: Solve for x
    x = 87,849,309.37/12,870
  6. Step 6: Final answer
    x = 6,825.90

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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.