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Finding the Fourth Proportional to 48,438.99, 72,659.87 and 13,378.65

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Solution

The fourth proportional to 48,438.99, 72,659.87 and 13,378.65 is: 20,068.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,438.99 : 72,659.87 = 13,378.65 : x
  2. Step 2: Convert to fraction form
    48,438.99/72,659.87 = 13,378.65/x
  3. Step 3: Cross multiply
    48,438.99x = 72,659.87 × 13,378.65
  4. Step 4: Simplify right side
    48,438.99x = 972,090,902.88
  5. Step 5: Solve for x
    x = 972,090,902.88/48,438.99
  6. Step 6: Final answer
    x = 20,068.36

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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.