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Finding the Fourth Proportional to 19,808.40, 29,711.52 and 6,659.40

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Solution

The fourth proportional to 19,808.40, 29,711.52 and 6,659.40 is: 9,988.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,808.40 : 29,711.52 = 6,659.40 : x
  2. Step 2: Convert to fraction form
    19,808.40/29,711.52 = 6,659.40/x
  3. Step 3: Cross multiply
    19,808.40x = 29,711.52 × 6,659.40
  4. Step 4: Simplify right side
    19,808.40x = 197,860,896.29
  5. Step 5: Solve for x
    x = 197,860,896.29/19,808.40
  6. Step 6: Final answer
    x = 9,988.74

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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.