Home / 13,021.56-17,969.65-7,718.90

Finding the Fourth Proportional to 13,021.56, 17,969.65 and 7,718.90

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Solution

The fourth proportional to 13,021.56, 17,969.65 and 7,718.90 is: 10,652.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,021.56 : 17,969.65 = 7,718.90 : x
  2. Step 2: Convert to fraction form
    13,021.56/17,969.65 = 7,718.90/x
  3. Step 3: Cross multiply
    13,021.56x = 17,969.65 × 7,718.90
  4. Step 4: Simplify right side
    13,021.56x = 138,705,822.24
  5. Step 5: Solve for x
    x = 138,705,822.24/13,021.56
  6. Step 6: Final answer
    x = 10,652.01

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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.