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Finding the Fourth Proportional to 47,357.90, 65,362.37 and 28,238.91

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Solution

The fourth proportional to 47,357.90, 65,362.37 and 28,238.91 is: 38,974.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,357.90 : 65,362.37 = 28,238.91 : x
  2. Step 2: Convert to fraction form
    47,357.90/65,362.37 = 28,238.91/x
  3. Step 3: Cross multiply
    47,357.90x = 65,362.37 × 28,238.91
  4. Step 4: Simplify right side
    47,357.90x = 1,845,762,083.82
  5. Step 5: Solve for x
    x = 1,845,762,083.82/47,357.90
  6. Step 6: Final answer
    x = 38,974.75

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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.