Home / 12,645.72-18,953.80-9,515.68

Finding the Fourth Proportional to 12,645.72, 18,953.80 and 9,515.68

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Solution

The fourth proportional to 12,645.72, 18,953.80 and 9,515.68 is: 14,262.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.72 : 18,953.80 = 9,515.68 : x
  2. Step 2: Convert to fraction form
    12,645.72/18,953.80 = 9,515.68/x
  3. Step 3: Cross multiply
    12,645.72x = 18,953.80 × 9,515.68
  4. Step 4: Simplify right side
    12,645.72x = 180,358,295.58
  5. Step 5: Solve for x
    x = 180,358,295.58/12,645.72
  6. Step 6: Final answer
    x = 14,262.40

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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.