Home / 28,218.50-38,941.54-15,643.25

Finding the Fourth Proportional to 28,218.50, 38,941.54 and 15,643.25

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Solution

The fourth proportional to 28,218.50, 38,941.54 and 15,643.25 is: 21,587.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.50 : 38,941.54 = 15,643.25 : x
  2. Step 2: Convert to fraction form
    28,218.50/38,941.54 = 15,643.25/x
  3. Step 3: Cross multiply
    28,218.50x = 38,941.54 × 15,643.25
  4. Step 4: Simplify right side
    28,218.50x = 609,172,167.39
  5. Step 5: Solve for x
    x = 609,172,167.39/28,218.50
  6. Step 6: Final answer
    x = 21,587.69

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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.