Home / 21,048.12-31,550.85-13,657.28

Finding the Fourth Proportional to 21,048.12, 31,550.85 and 13,657.28

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Solution

The fourth proportional to 21,048.12, 31,550.85 and 13,657.28 is: 20,472.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.12 : 31,550.85 = 13,657.28 : x
  2. Step 2: Convert to fraction form
    21,048.12/31,550.85 = 13,657.28/x
  3. Step 3: Cross multiply
    21,048.12x = 31,550.85 × 13,657.28
  4. Step 4: Simplify right side
    21,048.12x = 430,898,634.93
  5. Step 5: Solve for x
    x = 430,898,634.93/21,048.12
  6. Step 6: Final answer
    x = 20,472.07

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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.