Home / 10,971.40-15,137.92-6,722.16

Finding the Fourth Proportional to 10,971.40, 15,137.92 and 6,722.16

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Solution

The fourth proportional to 10,971.40, 15,137.92 and 6,722.16 is: 9,274.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,971.40 : 15,137.92 = 6,722.16 : x
  2. Step 2: Convert to fraction form
    10,971.40/15,137.92 = 6,722.16/x
  3. Step 3: Cross multiply
    10,971.40x = 15,137.92 × 6,722.16
  4. Step 4: Simplify right side
    10,971.40x = 101,759,520.31
  5. Step 5: Solve for x
    x = 101,759,520.31/10,971.40
  6. Step 6: Final answer
    x = 9,274.98

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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.