Home / 21,747.87-30,011.55-12,795.95

Finding the Fourth Proportional to 21,747.87, 30,011.55 and 12,795.95

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Solution

The fourth proportional to 21,747.87, 30,011.55 and 12,795.95 is: 17,658.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,747.87 : 30,011.55 = 12,795.95 : x
  2. Step 2: Convert to fraction form
    21,747.87/30,011.55 = 12,795.95/x
  3. Step 3: Cross multiply
    21,747.87x = 30,011.55 × 12,795.95
  4. Step 4: Simplify right side
    21,747.87x = 384,026,289.84
  5. Step 5: Solve for x
    x = 384,026,289.84/21,747.87
  6. Step 6: Final answer
    x = 17,658.11

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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.