Home / 21,015.87-31,502.54-13,625.03

Finding the Fourth Proportional to 21,015.87, 31,502.54 and 13,625.03

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Solution

The fourth proportional to 21,015.87, 31,502.54 and 13,625.03 is: 20,423.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.87 : 31,502.54 = 13,625.03 : x
  2. Step 2: Convert to fraction form
    21,015.87/31,502.54 = 13,625.03/x
  3. Step 3: Cross multiply
    21,015.87x = 31,502.54 × 13,625.03
  4. Step 4: Simplify right side
    21,015.87x = 429,223,052.58
  5. Step 5: Solve for x
    x = 429,223,052.58/21,015.87
  6. Step 6: Final answer
    x = 20,423.76

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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.