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Finding the Fourth Proportional to 30,357.72, 45,565.02 and 18,693.72

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Solution

The fourth proportional to 30,357.72, 45,565.02 and 18,693.72 is: 28,058.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,357.72 : 45,565.02 = 18,693.72 : x
  2. Step 2: Convert to fraction form
    30,357.72/45,565.02 = 18,693.72/x
  3. Step 3: Cross multiply
    30,357.72x = 45,565.02 × 18,693.72
  4. Step 4: Simplify right side
    30,357.72x = 851,779,725.67
  5. Step 5: Solve for x
    x = 851,779,725.67/30,357.72
  6. Step 6: Final answer
    x = 28,058.09

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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.