Home / 21,319.36-31,979.11-6,528.21

Finding the Fourth Proportional to 21,319.36, 31,979.11 and 6,528.21

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Solution

The fourth proportional to 21,319.36, 31,979.11 and 6,528.21 is: 9,792.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.36 : 31,979.11 = 6,528.21 : x
  2. Step 2: Convert to fraction form
    21,319.36/31,979.11 = 6,528.21/x
  3. Step 3: Cross multiply
    21,319.36x = 31,979.11 × 6,528.21
  4. Step 4: Simplify right side
    21,319.36x = 208,766,425.64
  5. Step 5: Solve for x
    x = 208,766,425.64/21,319.36
  6. Step 6: Final answer
    x = 9,792.34

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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.