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Finding the Fourth Proportional to 28,967.76, 43,412.76 and 15,800.40

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Solution

The fourth proportional to 28,967.76, 43,412.76 and 15,800.40 is: 23,679.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,967.76 : 43,412.76 = 15,800.40 : x
  2. Step 2: Convert to fraction form
    28,967.76/43,412.76 = 15,800.40/x
  3. Step 3: Cross multiply
    28,967.76x = 43,412.76 × 15,800.40
  4. Step 4: Simplify right side
    28,967.76x = 685,938,973.10
  5. Step 5: Solve for x
    x = 685,938,973.10/28,967.76
  6. Step 6: Final answer
    x = 23,679.39

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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.