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Finding the Fourth Proportional to 15,454.40, 21,329.73 and 8,742.11

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Solution

The fourth proportional to 15,454.40, 21,329.73 and 8,742.11 is: 12,065.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,454.40 : 21,329.73 = 8,742.11 : x
  2. Step 2: Convert to fraction form
    15,454.40/21,329.73 = 8,742.11/x
  3. Step 3: Cross multiply
    15,454.40x = 21,329.73 × 8,742.11
  4. Step 4: Simplify right side
    15,454.40x = 186,466,739.28
  5. Step 5: Solve for x
    x = 186,466,739.28/15,454.40
  6. Step 6: Final answer
    x = 12,065.61

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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.