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Finding the Fourth Proportional to 20,707.68, 28,610 and 14,448

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Solution

The fourth proportional to 20,707.68, 28,610 and 14,448 is: 19,961.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.68 : 28,610 = 14,448 : x
  2. Step 2: Convert to fraction form
    20,707.68/28,610 = 14,448/x
  3. Step 3: Cross multiply
    20,707.68x = 28,610 × 14,448
  4. Step 4: Simplify right side
    20,707.68x = 413,357,280
  5. Step 5: Solve for x
    x = 413,357,280/20,707.68
  6. Step 6: Final answer
    x = 19,961.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.