Home / 29,128.12-40,203.44-20,621.40

Finding the Fourth Proportional to 29,128.12, 40,203.44 and 20,621.40

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Solution

The fourth proportional to 29,128.12, 40,203.44 and 20,621.40 is: 28,462.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,128.12 : 40,203.44 = 20,621.40 : x
  2. Step 2: Convert to fraction form
    29,128.12/40,203.44 = 20,621.40/x
  3. Step 3: Cross multiply
    29,128.12x = 40,203.44 × 20,621.40
  4. Step 4: Simplify right side
    29,128.12x = 829,051,041.08
  5. Step 5: Solve for x
    x = 829,051,041.08/29,128.12
  6. Step 6: Final answer
    x = 28,462.23

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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.