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Finding the Fourth Proportional to 8,898.51, 12,279.95 and 4,919.63

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Solution

The fourth proportional to 8,898.51, 12,279.95 and 4,919.63 is: 6,789.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.51 : 12,279.95 = 4,919.63 : x
  2. Step 2: Convert to fraction form
    8,898.51/12,279.95 = 4,919.63/x
  3. Step 3: Cross multiply
    8,898.51x = 12,279.95 × 4,919.63
  4. Step 4: Simplify right side
    8,898.51x = 60,412,810.42
  5. Step 5: Solve for x
    x = 60,412,810.42/8,898.51
  6. Step 6: Final answer
    x = 6,789.09

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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.