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Finding the Fourth Proportional to 14,271.84, 19,691.28 and 8,678.88

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Solution

The fourth proportional to 14,271.84, 19,691.28 and 8,678.88 is: 11,974.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,271.84 : 19,691.28 = 8,678.88 : x
  2. Step 2: Convert to fraction form
    14,271.84/19,691.28 = 8,678.88/x
  3. Step 3: Cross multiply
    14,271.84x = 19,691.28 × 8,678.88
  4. Step 4: Simplify right side
    14,271.84x = 170,898,256.17
  5. Step 5: Solve for x
    x = 170,898,256.17/14,271.84
  6. Step 6: Final answer
    x = 11,974.51

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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.