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Finding the Fourth Proportional to 34,905.20, 52,357.80 and 20,908.40

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Solution

The fourth proportional to 34,905.20, 52,357.80 and 20,908.40 is: 31,362.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,905.20 : 52,357.80 = 20,908.40 : x
  2. Step 2: Convert to fraction form
    34,905.20/52,357.80 = 20,908.40/x
  3. Step 3: Cross multiply
    34,905.20x = 52,357.80 × 20,908.40
  4. Step 4: Simplify right side
    34,905.20x = 1,094,717,825.52
  5. Step 5: Solve for x
    x = 1,094,717,825.52/34,905.20
  6. Step 6: Final answer
    x = 31,362.60

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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.