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Finding the Fourth Proportional to 16,920.51, 25,373.77 and 6,388.74

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Solution

The fourth proportional to 16,920.51, 25,373.77 and 6,388.74 is: 9,580.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,920.51 : 25,373.77 = 6,388.74 : x
  2. Step 2: Convert to fraction form
    16,920.51/25,373.77 = 6,388.74/x
  3. Step 3: Cross multiply
    16,920.51x = 25,373.77 × 6,388.74
  4. Step 4: Simplify right side
    16,920.51x = 162,106,403.38
  5. Step 5: Solve for x
    x = 162,106,403.38/16,920.51
  6. Step 6: Final answer
    x = 9,580.47

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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.