Home / 13,021.56-17,971.38-7,718.40

Finding the Fourth Proportional to 13,021.56, 17,971.38 and 7,718.40

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Solution

The fourth proportional to 13,021.56, 17,971.38 and 7,718.40 is: 10,652.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,021.56 : 17,971.38 = 7,718.40 : x
  2. Step 2: Convert to fraction form
    13,021.56/17,971.38 = 7,718.40/x
  3. Step 3: Cross multiply
    13,021.56x = 17,971.38 × 7,718.40
  4. Step 4: Simplify right side
    13,021.56x = 138,710,299.39
  5. Step 5: Solve for x
    x = 138,710,299.39/13,021.56
  6. Step 6: Final answer
    x = 10,652.36

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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.