Home / 21,007.53-28,997.82-18,765.51

Finding the Fourth Proportional to 21,007.53, 28,997.82 and 18,765.51

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Solution

The fourth proportional to 21,007.53, 28,997.82 and 18,765.51 is: 25,903.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.53 : 28,997.82 = 18,765.51 : x
  2. Step 2: Convert to fraction form
    21,007.53/28,997.82 = 18,765.51/x
  3. Step 3: Cross multiply
    21,007.53x = 28,997.82 × 18,765.51
  4. Step 4: Simplify right side
    21,007.53x = 544,158,881.19
  5. Step 5: Solve for x
    x = 544,158,881.19/21,007.53
  6. Step 6: Final answer
    x = 25,903.04

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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.