Home / 21,012.76-31,496.46-9,309.88

Finding the Fourth Proportional to 21,012.76, 31,496.46 and 9,309.88

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Solution

The fourth proportional to 21,012.76, 31,496.46 and 9,309.88 is: 13,954.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.76 : 31,496.46 = 9,309.88 : x
  2. Step 2: Convert to fraction form
    21,012.76/31,496.46 = 9,309.88/x
  3. Step 3: Cross multiply
    21,012.76x = 31,496.46 × 9,309.88
  4. Step 4: Simplify right side
    21,012.76x = 293,228,263.02
  5. Step 5: Solve for x
    x = 293,228,263.02/21,012.76
  6. Step 6: Final answer
    x = 13,954.77

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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.