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Finding the Fourth Proportional to 18,869, 28,316.46 and 6,557

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Solution

The fourth proportional to 18,869, 28,316.46 and 6,557 is: 9,840.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869 : 28,316.46 = 6,557 : x
  2. Step 2: Convert to fraction form
    18,869/28,316.46 = 6,557/x
  3. Step 3: Cross multiply
    18,869x = 28,316.46 × 6,557
  4. Step 4: Simplify right side
    18,869x = 185,671,028.22
  5. Step 5: Solve for x
    x = 185,671,028.22/18,869
  6. Step 6: Final answer
    x = 9,840.00

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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.