Home / 12,139.74-16,762.95-8,173.98

Finding the Fourth Proportional to 12,139.74, 16,762.95 and 8,173.98

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Solution

The fourth proportional to 12,139.74, 16,762.95 and 8,173.98 is: 11,286.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.74 : 16,762.95 = 8,173.98 : x
  2. Step 2: Convert to fraction form
    12,139.74/16,762.95 = 8,173.98/x
  3. Step 3: Cross multiply
    12,139.74x = 16,762.95 × 8,173.98
  4. Step 4: Simplify right side
    12,139.74x = 137,020,018.04
  5. Step 5: Solve for x
    x = 137,020,018.04/12,139.74
  6. Step 6: Final answer
    x = 11,286.90

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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.