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Finding the Fourth Proportional to 19,690.48, 29,410.20 and 17,813.50

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Solution

The fourth proportional to 19,690.48, 29,410.20 and 17,813.50 is: 26,606.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,690.48 : 29,410.20 = 17,813.50 : x
  2. Step 2: Convert to fraction form
    19,690.48/29,410.20 = 17,813.50/x
  3. Step 3: Cross multiply
    19,690.48x = 29,410.20 × 17,813.50
  4. Step 4: Simplify right side
    19,690.48x = 523,898,597.70
  5. Step 5: Solve for x
    x = 523,898,597.70/19,690.48
  6. Step 6: Final answer
    x = 26,606.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.