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Finding the Fourth Proportional to 28,862.68, 43,237.89 and 18,971.89

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Solution

The fourth proportional to 28,862.68, 43,237.89 and 18,971.89 is: 28,420.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,862.68 : 43,237.89 = 18,971.89 : x
  2. Step 2: Convert to fraction form
    28,862.68/43,237.89 = 18,971.89/x
  3. Step 3: Cross multiply
    28,862.68x = 43,237.89 × 18,971.89
  4. Step 4: Simplify right side
    28,862.68x = 820,304,492.91
  5. Step 5: Solve for x
    x = 820,304,492.91/28,862.68
  6. Step 6: Final answer
    x = 28,420.94

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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.