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Finding the Fourth Proportional to 47,679.62, 65,790.56 and 28,554.91

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Solution

The fourth proportional to 47,679.62, 65,790.56 and 28,554.91 is: 39,401.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,679.62 : 65,790.56 = 28,554.91 : x
  2. Step 2: Convert to fraction form
    47,679.62/65,790.56 = 28,554.91/x
  3. Step 3: Cross multiply
    47,679.62x = 65,790.56 × 28,554.91
  4. Step 4: Simplify right side
    47,679.62x = 1,878,643,426.56
  5. Step 5: Solve for x
    x = 1,878,643,426.56/47,679.62
  6. Step 6: Final answer
    x = 39,401.40

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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.