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Finding the Fourth Proportional to 19,357.20, 29,068.20 and 12,812.40

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Solution

The fourth proportional to 19,357.20, 29,068.20 and 12,812.40 is: 19,240.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,357.20 : 29,068.20 = 12,812.40 : x
  2. Step 2: Convert to fraction form
    19,357.20/29,068.20 = 12,812.40/x
  3. Step 3: Cross multiply
    19,357.20x = 29,068.20 × 12,812.40
  4. Step 4: Simplify right side
    19,357.20x = 372,433,405.68
  5. Step 5: Solve for x
    x = 372,433,405.68/19,357.20
  6. Step 6: Final answer
    x = 19,240.05

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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.