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Finding the Fourth Proportional to 19,338.60, 29,007.90 and 19,079.40

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Solution

The fourth proportional to 19,338.60, 29,007.90 and 19,079.40 is: 28,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,338.60 : 29,007.90 = 19,079.40 : x
  2. Step 2: Convert to fraction form
    19,338.60/29,007.90 = 19,079.40/x
  3. Step 3: Cross multiply
    19,338.60x = 29,007.90 × 19,079.40
  4. Step 4: Simplify right side
    19,338.60x = 553,453,327.26
  5. Step 5: Solve for x
    x = 553,453,327.26/19,338.60
  6. Step 6: Final answer
    x = 28,619.10

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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.