Home / 21,322.40-31,970.84-10,080.63

Finding the Fourth Proportional to 21,322.40, 31,970.84 and 10,080.63

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Solution

The fourth proportional to 21,322.40, 31,970.84 and 10,080.63 is: 15,114.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.40 : 31,970.84 = 10,080.63 : x
  2. Step 2: Convert to fraction form
    21,322.40/31,970.84 = 10,080.63/x
  3. Step 3: Cross multiply
    21,322.40x = 31,970.84 × 10,080.63
  4. Step 4: Simplify right side
    21,322.40x = 322,286,158.43
  5. Step 5: Solve for x
    x = 322,286,158.43/21,322.40
  6. Step 6: Final answer
    x = 15,114.91

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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.