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Finding the Fourth Proportional to 16,719.60, 25,070.76 and 8,390.64

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Solution

The fourth proportional to 16,719.60, 25,070.76 and 8,390.64 is: 12,581.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,719.60 : 25,070.76 = 8,390.64 : x
  2. Step 2: Convert to fraction form
    16,719.60/25,070.76 = 8,390.64/x
  3. Step 3: Cross multiply
    16,719.60x = 25,070.76 × 8,390.64
  4. Step 4: Simplify right side
    16,719.60x = 210,359,721.69
  5. Step 5: Solve for x
    x = 210,359,721.69/16,719.60
  6. Step 6: Final answer
    x = 12,581.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.