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Finding the Fourth Proportional to 14,386.84, 19,855.52 and 8,721.52

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Solution

The fourth proportional to 14,386.84, 19,855.52 and 8,721.52 is: 12,036.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,386.84 : 19,855.52 = 8,721.52 : x
  2. Step 2: Convert to fraction form
    14,386.84/19,855.52 = 8,721.52/x
  3. Step 3: Cross multiply
    14,386.84x = 19,855.52 × 8,721.52
  4. Step 4: Simplify right side
    14,386.84x = 173,170,314.79
  5. Step 5: Solve for x
    x = 173,170,314.79/14,386.84
  6. Step 6: Final answer
    x = 12,036.72

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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.