Home / 28,218.54-38,940.99-15,643.02

Finding the Fourth Proportional to 28,218.54, 38,940.99 and 15,643.02

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Solution

The fourth proportional to 28,218.54, 38,940.99 and 15,643.02 is: 21,587.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.54 : 38,940.99 = 15,643.02 : x
  2. Step 2: Convert to fraction form
    28,218.54/38,940.99 = 15,643.02/x
  3. Step 3: Cross multiply
    28,218.54x = 38,940.99 × 15,643.02
  4. Step 4: Simplify right side
    28,218.54x = 609,154,685.39
  5. Step 5: Solve for x
    x = 609,154,685.39/28,218.54
  6. Step 6: Final answer
    x = 21,587.04

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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.