Home / 21,187.50-29,135.07-18,388.14

Finding the Fourth Proportional to 21,187.50, 29,135.07 and 18,388.14

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Solution

The fourth proportional to 21,187.50, 29,135.07 and 18,388.14 is: 25,285.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.50 : 29,135.07 = 18,388.14 : x
  2. Step 2: Convert to fraction form
    21,187.50/29,135.07 = 18,388.14/x
  3. Step 3: Cross multiply
    21,187.50x = 29,135.07 × 18,388.14
  4. Step 4: Simplify right side
    21,187.50x = 535,739,746.07
  5. Step 5: Solve for x
    x = 535,739,746.07/21,187.50
  6. Step 6: Final answer
    x = 25,285.65

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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.