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Finding the Fourth Proportional to 14,228.55, 19,615.59 and 8,919.81

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Solution

The fourth proportional to 14,228.55, 19,615.59 and 8,919.81 is: 12,296.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,228.55 : 19,615.59 = 8,919.81 : x
  2. Step 2: Convert to fraction form
    14,228.55/19,615.59 = 8,919.81/x
  3. Step 3: Cross multiply
    14,228.55x = 19,615.59 × 8,919.81
  4. Step 4: Simplify right side
    14,228.55x = 174,967,335.84
  5. Step 5: Solve for x
    x = 174,967,335.84/14,228.55
  6. Step 6: Final answer
    x = 12,296.92

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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.