Home / 21,069.32-31,369.97-20,775.06

Finding the Fourth Proportional to 21,069.32, 31,369.97 and 20,775.06

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Solution

The fourth proportional to 21,069.32, 31,369.97 and 20,775.06 is: 30,931.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.32 : 31,369.97 = 20,775.06 : x
  2. Step 2: Convert to fraction form
    21,069.32/31,369.97 = 20,775.06/x
  3. Step 3: Cross multiply
    21,069.32x = 31,369.97 × 20,775.06
  4. Step 4: Simplify right side
    21,069.32x = 651,713,008.95
  5. Step 5: Solve for x
    x = 651,713,008.95/21,069.32
  6. Step 6: Final answer
    x = 30,931.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.