Home / 13,720.48-18,927.29-8,676.20

Finding the Fourth Proportional to 13,720.48, 18,927.29 and 8,676.20

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Solution

The fourth proportional to 13,720.48, 18,927.29 and 8,676.20 is: 11,968.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.48 : 18,927.29 = 8,676.20 : x
  2. Step 2: Convert to fraction form
    13,720.48/18,927.29 = 8,676.20/x
  3. Step 3: Cross multiply
    13,720.48x = 18,927.29 × 8,676.20
  4. Step 4: Simplify right side
    13,720.48x = 164,217,022.51
  5. Step 5: Solve for x
    x = 164,217,022.51/13,720.48
  6. Step 6: Final answer
    x = 11,968.75

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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.