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Finding the Fourth Proportional to 28,334.82, 39,100.82 and 15,587.20

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Solution

The fourth proportional to 28,334.82, 39,100.82 and 15,587.20 is: 21,509.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,334.82 : 39,100.82 = 15,587.20 : x
  2. Step 2: Convert to fraction form
    28,334.82/39,100.82 = 15,587.20/x
  3. Step 3: Cross multiply
    28,334.82x = 39,100.82 × 15,587.20
  4. Step 4: Simplify right side
    28,334.82x = 609,472,125.82
  5. Step 5: Solve for x
    x = 609,472,125.82/28,334.82
  6. Step 6: Final answer
    x = 21,509.65

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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.