Home / 12,302.20-18,453.30-7,031.80

Finding the Fourth Proportional to 12,302.20, 18,453.30 and 7,031.80

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Solution

The fourth proportional to 12,302.20, 18,453.30 and 7,031.80 is: 10,547.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,302.20 : 18,453.30 = 7,031.80 : x
  2. Step 2: Convert to fraction form
    12,302.20/18,453.30 = 7,031.80/x
  3. Step 3: Cross multiply
    12,302.20x = 18,453.30 × 7,031.80
  4. Step 4: Simplify right side
    12,302.20x = 129,759,914.94
  5. Step 5: Solve for x
    x = 129,759,914.94/12,302.20
  6. Step 6: Final answer
    x = 10,547.70

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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.