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Finding the Fourth Proportional to 25,978.77, 35,851.10 and 15,221.06

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Solution

The fourth proportional to 25,978.77, 35,851.10 and 15,221.06 is: 21,005.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,978.77 : 35,851.10 = 15,221.06 : x
  2. Step 2: Convert to fraction form
    25,978.77/35,851.10 = 15,221.06/x
  3. Step 3: Cross multiply
    25,978.77x = 35,851.10 × 15,221.06
  4. Step 4: Simplify right side
    25,978.77x = 545,691,853.45
  5. Step 5: Solve for x
    x = 545,691,853.45/25,978.77
  6. Step 6: Final answer
    x = 21,005.30

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1.5x scale

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.