Home / 15,927.74-21,947.90-12,320.79

Finding the Fourth Proportional to 15,927.74, 21,947.90 and 12,320.79

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Solution

The fourth proportional to 15,927.74, 21,947.90 and 12,320.79 is: 16,977.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,927.74 : 21,947.90 = 12,320.79 : x
  2. Step 2: Convert to fraction form
    15,927.74/21,947.90 = 12,320.79/x
  3. Step 3: Cross multiply
    15,927.74x = 21,947.90 × 12,320.79
  4. Step 4: Simplify right side
    15,927.74x = 270,415,295.50
  5. Step 5: Solve for x
    x = 270,415,295.50/15,927.74
  6. Step 6: Final answer
    x = 16,977.63

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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.