Home / 12,985.66-19,474.44-4,218.76

Finding the Fourth Proportional to 12,985.66, 19,474.44 and 4,218.76

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Solution

The fourth proportional to 12,985.66, 19,474.44 and 4,218.76 is: 6,326.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.66 : 19,474.44 = 4,218.76 : x
  2. Step 2: Convert to fraction form
    12,985.66/19,474.44 = 4,218.76/x
  3. Step 3: Cross multiply
    12,985.66x = 19,474.44 × 4,218.76
  4. Step 4: Simplify right side
    12,985.66x = 82,157,988.49
  5. Step 5: Solve for x
    x = 82,157,988.49/12,985.66
  6. Step 6: Final answer
    x = 6,326.82

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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.