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Finding the Fourth Proportional to 61,034.80, 91,515.84 and 18,902.40

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Solution

The fourth proportional to 61,034.80, 91,515.84 and 18,902.40 is: 28,342.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,034.80 : 91,515.84 = 18,902.40 : x
  2. Step 2: Convert to fraction form
    61,034.80/91,515.84 = 18,902.40/x
  3. Step 3: Cross multiply
    61,034.80x = 91,515.84 × 18,902.40
  4. Step 4: Simplify right side
    61,034.80x = 1,729,869,014.02
  5. Step 5: Solve for x
    x = 1,729,869,014.02/61,034.80
  6. Step 6: Final answer
    x = 28,342.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.