Home / 21,304.77-31,921.84-12,959.55

Finding the Fourth Proportional to 21,304.77, 31,921.84 and 12,959.55

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Solution

The fourth proportional to 21,304.77, 31,921.84 and 12,959.55 is: 19,417.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,304.77 : 31,921.84 = 12,959.55 : x
  2. Step 2: Convert to fraction form
    21,304.77/31,921.84 = 12,959.55/x
  3. Step 3: Cross multiply
    21,304.77x = 31,921.84 × 12,959.55
  4. Step 4: Simplify right side
    21,304.77x = 413,692,681.57
  5. Step 5: Solve for x
    x = 413,692,681.57/21,304.77
  6. Step 6: Final answer
    x = 19,417.84

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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.