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Finding the Fourth Proportional to 12,903.52, 17,790.36 and 8,358.18

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Solution

The fourth proportional to 12,903.52, 17,790.36 and 8,358.18 is: 11,523.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.52 : 17,790.36 = 8,358.18 : x
  2. Step 2: Convert to fraction form
    12,903.52/17,790.36 = 8,358.18/x
  3. Step 3: Cross multiply
    12,903.52x = 17,790.36 × 8,358.18
  4. Step 4: Simplify right side
    12,903.52x = 148,695,031.14
  5. Step 5: Solve for x
    x = 148,695,031.14/12,903.52
  6. Step 6: Final answer
    x = 11,523.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.