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Finding the Fourth Proportional to 15,118.19, 20,862.19 and 8,403.58

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Solution

The fourth proportional to 15,118.19, 20,862.19 and 8,403.58 is: 11,596.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.19 : 20,862.19 = 8,403.58 : x
  2. Step 2: Convert to fraction form
    15,118.19/20,862.19 = 8,403.58/x
  3. Step 3: Cross multiply
    15,118.19x = 20,862.19 × 8,403.58
  4. Step 4: Simplify right side
    15,118.19x = 175,317,082.64
  5. Step 5: Solve for x
    x = 175,317,082.64/15,118.19
  6. Step 6: Final answer
    x = 11,596.43

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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.