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Finding the Fourth Proportional to 30,387, 41,935.70 and 17,815.80

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Solution

The fourth proportional to 30,387, 41,935.70 and 17,815.80 is: 24,586.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,387 : 41,935.70 = 17,815.80 : x
  2. Step 2: Convert to fraction form
    30,387/41,935.70 = 17,815.80/x
  3. Step 3: Cross multiply
    30,387x = 41,935.70 × 17,815.80
  4. Step 4: Simplify right side
    30,387x = 747,118,044.06
  5. Step 5: Solve for x
    x = 747,118,044.06/30,387
  6. Step 6: Final answer
    x = 24,586.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.