Home / 20,560.37-28,373.85-12,491.28

Finding the Fourth Proportional to 20,560.37, 28,373.85 and 12,491.28

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Solution

The fourth proportional to 20,560.37, 28,373.85 and 12,491.28 is: 17,238.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.37 : 28,373.85 = 12,491.28 : x
  2. Step 2: Convert to fraction form
    20,560.37/28,373.85 = 12,491.28/x
  3. Step 3: Cross multiply
    20,560.37x = 28,373.85 × 12,491.28
  4. Step 4: Simplify right side
    20,560.37x = 354,425,705.03
  5. Step 5: Solve for x
    x = 354,425,705.03/20,560.37
  6. Step 6: Final answer
    x = 17,238.30

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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.