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Finding the Fourth Proportional to 28,575.40, 42,869.24 and 14,537.40

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Solution

The fourth proportional to 28,575.40, 42,869.24 and 14,537.40 is: 21,809.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,575.40 : 42,869.24 = 14,537.40 : x
  2. Step 2: Convert to fraction form
    28,575.40/42,869.24 = 14,537.40/x
  3. Step 3: Cross multiply
    28,575.40x = 42,869.24 × 14,537.40
  4. Step 4: Simplify right side
    28,575.40x = 623,207,289.58
  5. Step 5: Solve for x
    x = 623,207,289.58/28,575.40
  6. Step 6: Final answer
    x = 21,809.22

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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.