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Finding the Fourth Proportional to 8,759.70, 13,139.55 and 7,953.30

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Solution

The fourth proportional to 8,759.70, 13,139.55 and 7,953.30 is: 11,929.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.70 : 13,139.55 = 7,953.30 : x
  2. Step 2: Convert to fraction form
    8,759.70/13,139.55 = 7,953.30/x
  3. Step 3: Cross multiply
    8,759.70x = 13,139.55 × 7,953.30
  4. Step 4: Simplify right side
    8,759.70x = 104,502,783.02
  5. Step 5: Solve for x
    x = 104,502,783.02/8,759.70
  6. Step 6: Final answer
    x = 11,929.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.