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Finding the Fourth Proportional to 19,643.80, 29,465.70 and 19,352.20

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Solution

The fourth proportional to 19,643.80, 29,465.70 and 19,352.20 is: 29,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,643.80 : 29,465.70 = 19,352.20 : x
  2. Step 2: Convert to fraction form
    19,643.80/29,465.70 = 19,352.20/x
  3. Step 3: Cross multiply
    19,643.80x = 29,465.70 × 19,352.20
  4. Step 4: Simplify right side
    19,643.80x = 570,226,119.54
  5. Step 5: Solve for x
    x = 570,226,119.54/19,643.80
  6. Step 6: Final answer
    x = 29,028.30

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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.