Home / 28,618.29-39,489.48-15,871.32

Finding the Fourth Proportional to 28,618.29, 39,489.48 and 15,871.32

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Solution

The fourth proportional to 28,618.29, 39,489.48 and 15,871.32 is: 21,900.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.29 : 39,489.48 = 15,871.32 : x
  2. Step 2: Convert to fraction form
    28,618.29/39,489.48 = 15,871.32/x
  3. Step 3: Cross multiply
    28,618.29x = 39,489.48 × 15,871.32
  4. Step 4: Simplify right side
    28,618.29x = 626,750,173.71
  5. Step 5: Solve for x
    x = 626,750,173.71/28,618.29
  6. Step 6: Final answer
    x = 21,900.34

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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.