Home / 28,154.26-38,798.40-21,429.25

Finding the Fourth Proportional to 28,154.26, 38,798.40 and 21,429.25

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Solution

The fourth proportional to 28,154.26, 38,798.40 and 21,429.25 is: 29,530.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.26 : 38,798.40 = 21,429.25 : x
  2. Step 2: Convert to fraction form
    28,154.26/38,798.40 = 21,429.25/x
  3. Step 3: Cross multiply
    28,154.26x = 38,798.40 × 21,429.25
  4. Step 4: Simplify right side
    28,154.26x = 831,420,613.20
  5. Step 5: Solve for x
    x = 831,420,613.20/28,154.26
  6. Step 6: Final answer
    x = 29,530.90

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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.