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Finding the Fourth Proportional to 19,599.60, 29,399.40 and 17,720.40

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Solution

The fourth proportional to 19,599.60, 29,399.40 and 17,720.40 is: 26,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,599.60 : 29,399.40 = 17,720.40 : x
  2. Step 2: Convert to fraction form
    19,599.60/29,399.40 = 17,720.40/x
  3. Step 3: Cross multiply
    19,599.60x = 29,399.40 × 17,720.40
  4. Step 4: Simplify right side
    19,599.60x = 520,969,127.76
  5. Step 5: Solve for x
    x = 520,969,127.76/19,599.60
  6. Step 6: Final answer
    x = 26,580.60

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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.