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Finding the Fourth Proportional to 14,919.92, 20,586.80 and 8,459.58

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Solution

The fourth proportional to 14,919.92, 20,586.80 and 8,459.58 is: 11,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,919.92 : 20,586.80 = 8,459.58 : x
  2. Step 2: Convert to fraction form
    14,919.92/20,586.80 = 8,459.58/x
  3. Step 3: Cross multiply
    14,919.92x = 20,586.80 × 8,459.58
  4. Step 4: Simplify right side
    14,919.92x = 174,155,681.54
  5. Step 5: Solve for x
    x = 174,155,681.54/14,919.92
  6. Step 6: Final answer
    x = 11,672.70

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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.