Home / 20,649.18-28,507.97-14,978.48

Finding the Fourth Proportional to 20,649.18, 28,507.97 and 14,978.48

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Solution

The fourth proportional to 20,649.18, 28,507.97 and 14,978.48 is: 20,679.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.18 : 28,507.97 = 14,978.48 : x
  2. Step 2: Convert to fraction form
    20,649.18/28,507.97 = 14,978.48/x
  3. Step 3: Cross multiply
    20,649.18x = 28,507.97 × 14,978.48
  4. Step 4: Simplify right side
    20,649.18x = 427,005,983.59
  5. Step 5: Solve for x
    x = 427,005,983.59/20,649.18
  6. Step 6: Final answer
    x = 20,679.08

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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.