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Finding the Fourth Proportional to 14,387.82, 19,855.47 and 8,721.18

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Solution

The fourth proportional to 14,387.82, 19,855.47 and 8,721.18 is: 12,035.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,387.82 : 19,855.47 = 8,721.18 : x
  2. Step 2: Convert to fraction form
    14,387.82/19,855.47 = 8,721.18/x
  3. Step 3: Cross multiply
    14,387.82x = 19,855.47 × 8,721.18
  4. Step 4: Simplify right side
    14,387.82x = 173,163,127.85
  5. Step 5: Solve for x
    x = 173,163,127.85/14,387.82
  6. Step 6: Final answer
    x = 12,035.40

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1.5x scale

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.