Home / 15,535.40-21,451.48-12,664.57

Finding the Fourth Proportional to 15,535.40, 21,451.48 and 12,664.57

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Solution

The fourth proportional to 15,535.40, 21,451.48 and 12,664.57 is: 17,487.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,535.40 : 21,451.48 = 12,664.57 : x
  2. Step 2: Convert to fraction form
    15,535.40/21,451.48 = 12,664.57/x
  3. Step 3: Cross multiply
    15,535.40x = 21,451.48 × 12,664.57
  4. Step 4: Simplify right side
    15,535.40x = 271,673,796.23
  5. Step 5: Solve for x
    x = 271,673,796.23/15,535.40
  6. Step 6: Final answer
    x = 17,487.41

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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.