Home / 21,304.55-31,955.75-8,155.91

Finding the Fourth Proportional to 21,304.55, 31,955.75 and 8,155.91

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Solution

The fourth proportional to 21,304.55, 31,955.75 and 8,155.91 is: 12,233.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,304.55 : 31,955.75 = 8,155.91 : x
  2. Step 2: Convert to fraction form
    21,304.55/31,955.75 = 8,155.91/x
  3. Step 3: Cross multiply
    21,304.55x = 31,955.75 × 8,155.91
  4. Step 4: Simplify right side
    21,304.55x = 260,628,180.20
  5. Step 5: Solve for x
    x = 260,628,180.20/21,304.55
  6. Step 6: Final answer
    x = 12,233.45

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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.