Home / 21,187.76-29,238.96-11,756.32

Finding the Fourth Proportional to 21,187.76, 29,238.96 and 11,756.32

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Solution

The fourth proportional to 21,187.76, 29,238.96 and 11,756.32 is: 16,223.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.76 : 29,238.96 = 11,756.32 : x
  2. Step 2: Convert to fraction form
    21,187.76/29,238.96 = 11,756.32/x
  3. Step 3: Cross multiply
    21,187.76x = 29,238.96 × 11,756.32
  4. Step 4: Simplify right side
    21,187.76x = 343,742,570.23
  5. Step 5: Solve for x
    x = 343,742,570.23/21,187.76
  6. Step 6: Final answer
    x = 16,223.64

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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.