Home / 21,319.48-31,979.30-6,528.34

Finding the Fourth Proportional to 21,319.48, 31,979.30 and 6,528.34

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Solution

The fourth proportional to 21,319.48, 31,979.30 and 6,528.34 is: 9,792.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.48 : 31,979.30 = 6,528.34 : x
  2. Step 2: Convert to fraction form
    21,319.48/31,979.30 = 6,528.34/x
  3. Step 3: Cross multiply
    21,319.48x = 31,979.30 × 6,528.34
  4. Step 4: Simplify right side
    21,319.48x = 208,771,550.82
  5. Step 5: Solve for x
    x = 208,771,550.82/21,319.48
  6. Step 6: Final answer
    x = 9,792.53

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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.