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Finding the Fourth Proportional to 40,894.85, 61,342.29 and 12,814.90

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Solution

The fourth proportional to 40,894.85, 61,342.29 and 12,814.90 is: 19,222.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,894.85 : 61,342.29 = 12,814.90 : x
  2. Step 2: Convert to fraction form
    40,894.85/61,342.29 = 12,814.90/x
  3. Step 3: Cross multiply
    40,894.85x = 61,342.29 × 12,814.90
  4. Step 4: Simplify right side
    40,894.85x = 786,095,280.08
  5. Step 5: Solve for x
    x = 786,095,280.08/40,894.85
  6. Step 6: Final answer
    x = 19,222.35

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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.