Home / 39,892.12-55,051.46-21,987.16

Finding the Fourth Proportional to 39,892.12, 55,051.46 and 21,987.16

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Solution

The fourth proportional to 39,892.12, 55,051.46 and 21,987.16 is: 30,342.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,892.12 : 55,051.46 = 21,987.16 : x
  2. Step 2: Convert to fraction form
    39,892.12/55,051.46 = 21,987.16/x
  3. Step 3: Cross multiply
    39,892.12x = 55,051.46 × 21,987.16
  4. Step 4: Simplify right side
    39,892.12x = 1,210,425,259.25
  5. Step 5: Solve for x
    x = 1,210,425,259.25/39,892.12
  6. Step 6: Final answer
    x = 30,342.47

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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.