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Finding the Fourth Proportional to 8,913.84, 12,302.80 and 5,139.52

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Solution

The fourth proportional to 8,913.84, 12,302.80 and 5,139.52 is: 7,093.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.84 : 12,302.80 = 5,139.52 : x
  2. Step 2: Convert to fraction form
    8,913.84/12,302.80 = 5,139.52/x
  3. Step 3: Cross multiply
    8,913.84x = 12,302.80 × 5,139.52
  4. Step 4: Simplify right side
    8,913.84x = 63,230,486.66
  5. Step 5: Solve for x
    x = 63,230,486.66/8,913.84
  6. Step 6: Final answer
    x = 7,093.52

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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.