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Finding the Fourth Proportional to 40,953.80, 61,430.84 and 12,876.17

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Solution

The fourth proportional to 40,953.80, 61,430.84 and 12,876.17 is: 19,314.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,953.80 : 61,430.84 = 12,876.17 : x
  2. Step 2: Convert to fraction form
    40,953.80/61,430.84 = 12,876.17/x
  3. Step 3: Cross multiply
    40,953.80x = 61,430.84 × 12,876.17
  4. Step 4: Simplify right side
    40,953.80x = 790,993,615.83
  5. Step 5: Solve for x
    x = 790,993,615.83/40,953.80
  6. Step 6: Final answer
    x = 19,314.29

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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.