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Finding the Fourth Proportional to 34,715.72, 52,073.73 and 8,420.45

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Solution

The fourth proportional to 34,715.72, 52,073.73 and 8,420.45 is: 12,630.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,715.72 : 52,073.73 = 8,420.45 : x
  2. Step 2: Convert to fraction form
    34,715.72/52,073.73 = 8,420.45/x
  3. Step 3: Cross multiply
    34,715.72x = 52,073.73 × 8,420.45
  4. Step 4: Simplify right side
    34,715.72x = 438,483,979.41
  5. Step 5: Solve for x
    x = 438,483,979.41/34,715.72
  6. Step 6: Final answer
    x = 12,630.70

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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.