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Finding the Fourth Proportional to 37,985.40, 56,978.14 and 9,905.43

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Solution

The fourth proportional to 37,985.40, 56,978.14 and 9,905.43 is: 14,858.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,985.40 : 56,978.14 = 9,905.43 : x
  2. Step 2: Convert to fraction form
    37,985.40/56,978.14 = 9,905.43/x
  3. Step 3: Cross multiply
    37,985.40x = 56,978.14 × 9,905.43
  4. Step 4: Simplify right side
    37,985.40x = 564,392,977.30
  5. Step 5: Solve for x
    x = 564,392,977.30/37,985.40
  6. Step 6: Final answer
    x = 14,858.16

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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.