Home / 11,439.16-15,782.88-6,721.72

Finding the Fourth Proportional to 11,439.16, 15,782.88 and 6,721.72

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Solution

The fourth proportional to 11,439.16, 15,782.88 and 6,721.72 is: 9,274.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.16 : 15,782.88 = 6,721.72 : x
  2. Step 2: Convert to fraction form
    11,439.16/15,782.88 = 6,721.72/x
  3. Step 3: Cross multiply
    11,439.16x = 15,782.88 × 6,721.72
  4. Step 4: Simplify right side
    11,439.16x = 106,088,100.15
  5. Step 5: Solve for x
    x = 106,088,100.15/11,439.16
  6. Step 6: Final answer
    x = 9,274.12

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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.