Home / 20,711.19-28,571.67-13,999.16

Finding the Fourth Proportional to 20,711.19, 28,571.67 and 13,999.16

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Solution

The fourth proportional to 20,711.19, 28,571.67 and 13,999.16 is: 19,312.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.19 : 28,571.67 = 13,999.16 : x
  2. Step 2: Convert to fraction form
    20,711.19/28,571.67 = 13,999.16/x
  3. Step 3: Cross multiply
    20,711.19x = 28,571.67 × 13,999.16
  4. Step 4: Simplify right side
    20,711.19x = 399,979,451.23
  5. Step 5: Solve for x
    x = 399,979,451.23/20,711.19
  6. Step 6: Final answer
    x = 19,312.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.