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Finding the Fourth Proportional to 38,978.55, 53,775.99 and 25,557.21

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Solution

The fourth proportional to 38,978.55, 53,775.99 and 25,557.21 is: 35,259.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,978.55 : 53,775.99 = 25,557.21 : x
  2. Step 2: Convert to fraction form
    38,978.55/53,775.99 = 25,557.21/x
  3. Step 3: Cross multiply
    38,978.55x = 53,775.99 × 25,557.21
  4. Step 4: Simplify right side
    38,978.55x = 1,374,364,269.39
  5. Step 5: Solve for x
    x = 1,374,364,269.39/38,978.55
  6. Step 6: Final answer
    x = 35,259.50

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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.