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Finding the Fourth Proportional to 35,983.40, 53,999.40 and 20,188.40

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Solution

The fourth proportional to 35,983.40, 53,999.40 and 20,188.40 is: 30,296.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,983.40 : 53,999.40 = 20,188.40 : x
  2. Step 2: Convert to fraction form
    35,983.40/53,999.40 = 20,188.40/x
  3. Step 3: Cross multiply
    35,983.40x = 53,999.40 × 20,188.40
  4. Step 4: Simplify right side
    35,983.40x = 1,090,161,486.96
  5. Step 5: Solve for x
    x = 1,090,161,486.96/35,983.40
  6. Step 6: Final answer
    x = 30,296.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.