Home / 21,320.28-31,985.34-6,531.36

Finding the Fourth Proportional to 21,320.28, 31,985.34 and 6,531.36

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Solution

The fourth proportional to 21,320.28, 31,985.34 and 6,531.36 is: 9,798.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.28 : 31,985.34 = 6,531.36 : x
  2. Step 2: Convert to fraction form
    21,320.28/31,985.34 = 6,531.36/x
  3. Step 3: Cross multiply
    21,320.28x = 31,985.34 × 6,531.36
  4. Step 4: Simplify right side
    21,320.28x = 208,907,770.26
  5. Step 5: Solve for x
    x = 208,907,770.26/21,320.28
  6. Step 6: Final answer
    x = 9,798.55

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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.