Home / 12,615.48-18,890.91-10,530.30

Finding the Fourth Proportional to 12,615.48, 18,890.91 and 10,530.30

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Solution

The fourth proportional to 12,615.48, 18,890.91 and 10,530.30 is: 15,768.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.48 : 18,890.91 = 10,530.30 : x
  2. Step 2: Convert to fraction form
    12,615.48/18,890.91 = 10,530.30/x
  3. Step 3: Cross multiply
    12,615.48x = 18,890.91 × 10,530.30
  4. Step 4: Simplify right side
    12,615.48x = 198,926,949.57
  5. Step 5: Solve for x
    x = 198,926,949.57/12,615.48
  6. Step 6: Final answer
    x = 15,768.48

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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.