Home / 21,303.30-31,925.79-13,517.58

Finding the Fourth Proportional to 21,303.30, 31,925.79 and 13,517.58

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Solution

The fourth proportional to 21,303.30, 31,925.79 and 13,517.58 is: 20,257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.30 : 31,925.79 = 13,517.58 : x
  2. Step 2: Convert to fraction form
    21,303.30/31,925.79 = 13,517.58/x
  3. Step 3: Cross multiply
    21,303.30x = 31,925.79 × 13,517.58
  4. Step 4: Simplify right side
    21,303.30x = 431,559,420.39
  5. Step 5: Solve for x
    x = 431,559,420.39/21,303.30
  6. Step 6: Final answer
    x = 20,257.87

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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.