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Finding the Fourth Proportional to 19,425.30, 29,145.15 and 18,705.30

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Solution

The fourth proportional to 19,425.30, 29,145.15 and 18,705.30 is: 28,064.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,425.30 : 29,145.15 = 18,705.30 : x
  2. Step 2: Convert to fraction form
    19,425.30/29,145.15 = 18,705.30/x
  3. Step 3: Cross multiply
    19,425.30x = 29,145.15 × 18,705.30
  4. Step 4: Simplify right side
    19,425.30x = 545,168,774.30
  5. Step 5: Solve for x
    x = 545,168,774.30/19,425.30
  6. Step 6: Final answer
    x = 28,064.88

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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.