Home / 13,972.10-20,921.16-7,378.28

Finding the Fourth Proportional to 13,972.10, 20,921.16 and 7,378.28

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Solution

The fourth proportional to 13,972.10, 20,921.16 and 7,378.28 is: 11,047.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,972.10 : 20,921.16 = 7,378.28 : x
  2. Step 2: Convert to fraction form
    13,972.10/20,921.16 = 7,378.28/x
  3. Step 3: Cross multiply
    13,972.10x = 20,921.16 × 7,378.28
  4. Step 4: Simplify right side
    13,972.10x = 154,362,176.40
  5. Step 5: Solve for x
    x = 154,362,176.40/13,972.10
  6. Step 6: Final answer
    x = 11,047.89

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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.