Home / 21,304.06-31,931.84-12,965.72

Finding the Fourth Proportional to 21,304.06, 31,931.84 and 12,965.72

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Solution

The fourth proportional to 21,304.06, 31,931.84 and 12,965.72 is: 19,433.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,304.06 : 31,931.84 = 12,965.72 : x
  2. Step 2: Convert to fraction form
    21,304.06/31,931.84 = 12,965.72/x
  3. Step 3: Cross multiply
    21,304.06x = 31,931.84 × 12,965.72
  4. Step 4: Simplify right side
    21,304.06x = 414,019,169.28
  5. Step 5: Solve for x
    x = 414,019,169.28/21,304.06
  6. Step 6: Final answer
    x = 19,433.82

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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.