Home / 28,159.45-38,805.58-21,434.42

Finding the Fourth Proportional to 28,159.45, 38,805.58 and 21,434.42

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Solution

The fourth proportional to 28,159.45, 38,805.58 and 21,434.42 is: 29,538.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,159.45 : 38,805.58 = 21,434.42 : x
  2. Step 2: Convert to fraction form
    28,159.45/38,805.58 = 21,434.42/x
  3. Step 3: Cross multiply
    28,159.45x = 38,805.58 × 21,434.42
  4. Step 4: Simplify right side
    28,159.45x = 831,775,223.87
  5. Step 5: Solve for x
    x = 831,775,223.87/28,159.45
  6. Step 6: Final answer
    x = 29,538.05

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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.