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Finding the Fourth Proportional to 30,293.40, 45,342.90 and 21,545.40

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Solution

The fourth proportional to 30,293.40, 45,342.90 and 21,545.40 is: 32,248.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,293.40 : 45,342.90 = 21,545.40 : x
  2. Step 2: Convert to fraction form
    30,293.40/45,342.90 = 21,545.40/x
  3. Step 3: Cross multiply
    30,293.40x = 45,342.90 × 21,545.40
  4. Step 4: Simplify right side
    30,293.40x = 976,930,917.66
  5. Step 5: Solve for x
    x = 976,930,917.66/30,293.40
  6. Step 6: Final answer
    x = 32,248.97

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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.