Home / 20,280.51-28,130.29-19,741.05

Finding the Fourth Proportional to 20,280.51, 28,130.29 and 19,741.05

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Solution

The fourth proportional to 20,280.51, 28,130.29 and 19,741.05 is: 27,382.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.51 : 28,130.29 = 19,741.05 : x
  2. Step 2: Convert to fraction form
    20,280.51/28,130.29 = 19,741.05/x
  3. Step 3: Cross multiply
    20,280.51x = 28,130.29 × 19,741.05
  4. Step 4: Simplify right side
    20,280.51x = 555,321,412.05
  5. Step 5: Solve for x
    x = 555,321,412.05/20,280.51
  6. Step 6: Final answer
    x = 27,382.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.