Home / 28,382.84-39,171.38-15,637.32

Finding the Fourth Proportional to 28,382.84, 39,171.38 and 15,637.32

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Solution

The fourth proportional to 28,382.84, 39,171.38 and 15,637.32 is: 21,581.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.84 : 39,171.38 = 15,637.32 : x
  2. Step 2: Convert to fraction form
    28,382.84/39,171.38 = 15,637.32/x
  3. Step 3: Cross multiply
    28,382.84x = 39,171.38 × 15,637.32
  4. Step 4: Simplify right side
    28,382.84x = 612,535,325.72
  5. Step 5: Solve for x
    x = 612,535,325.72/28,382.84
  6. Step 6: Final answer
    x = 21,581.19

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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.