Home / 12,309.58-18,462.14-3,988.45

Finding the Fourth Proportional to 12,309.58, 18,462.14 and 3,988.45

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Solution

The fourth proportional to 12,309.58, 18,462.14 and 3,988.45 is: 5,981.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.58 : 18,462.14 = 3,988.45 : x
  2. Step 2: Convert to fraction form
    12,309.58/18,462.14 = 3,988.45/x
  3. Step 3: Cross multiply
    12,309.58x = 18,462.14 × 3,988.45
  4. Step 4: Simplify right side
    12,309.58x = 73,635,322.28
  5. Step 5: Solve for x
    x = 73,635,322.28/12,309.58
  6. Step 6: Final answer
    x = 5,981.95

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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.