Home / 13,780.53-20,663.51-5,460.21

Finding the Fourth Proportional to 13,780.53, 20,663.51 and 5,460.21

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Solution

The fourth proportional to 13,780.53, 20,663.51 and 5,460.21 is: 8,187.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.53 : 20,663.51 = 5,460.21 : x
  2. Step 2: Convert to fraction form
    13,780.53/20,663.51 = 5,460.21/x
  3. Step 3: Cross multiply
    13,780.53x = 20,663.51 × 5,460.21
  4. Step 4: Simplify right side
    13,780.53x = 112,827,076.64
  5. Step 5: Solve for x
    x = 112,827,076.64/13,780.53
  6. Step 6: Final answer
    x = 8,187.43

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1.5x scale

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.