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Finding the Fourth Proportional to 26,978.40, 37,225.68 and 15,039.12

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Solution

The fourth proportional to 26,978.40, 37,225.68 and 15,039.12 is: 20,751.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,978.40 : 37,225.68 = 15,039.12 : x
  2. Step 2: Convert to fraction form
    26,978.40/37,225.68 = 15,039.12/x
  3. Step 3: Cross multiply
    26,978.40x = 37,225.68 × 15,039.12
  4. Step 4: Simplify right side
    26,978.40x = 559,841,468.60
  5. Step 5: Solve for x
    x = 559,841,468.60/26,978.40
  6. Step 6: Final answer
    x = 20,751.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.