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Finding the Fourth Proportional to 28,681.68, 43,024.68 and 7,905

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Solution

The fourth proportional to 28,681.68, 43,024.68 and 7,905 is: 11,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.68 : 43,024.68 = 7,905 : x
  2. Step 2: Convert to fraction form
    28,681.68/43,024.68 = 7,905/x
  3. Step 3: Cross multiply
    28,681.68x = 43,024.68 × 7,905
  4. Step 4: Simplify right side
    28,681.68x = 340,110,095.40
  5. Step 5: Solve for x
    x = 340,110,095.40/28,681.68
  6. Step 6: Final answer
    x = 11,858.10

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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.