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Finding the Fourth Proportional to 14,364.65, 21,528.71 and 6,458.72

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Solution

The fourth proportional to 14,364.65, 21,528.71 and 6,458.72 is: 9,679.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,364.65 : 21,528.71 = 6,458.72 : x
  2. Step 2: Convert to fraction form
    14,364.65/21,528.71 = 6,458.72/x
  3. Step 3: Cross multiply
    14,364.65x = 21,528.71 × 6,458.72
  4. Step 4: Simplify right side
    14,364.65x = 139,047,818.35
  5. Step 5: Solve for x
    x = 139,047,818.35/14,364.65
  6. Step 6: Final answer
    x = 9,679.86

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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.