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Finding the Fourth Proportional to 43,625.66, 65,406.69 and 19,920.40

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Solution

The fourth proportional to 43,625.66, 65,406.69 and 19,920.40 is: 29,866.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,625.66 : 65,406.69 = 19,920.40 : x
  2. Step 2: Convert to fraction form
    43,625.66/65,406.69 = 19,920.40/x
  3. Step 3: Cross multiply
    43,625.66x = 65,406.69 × 19,920.40
  4. Step 4: Simplify right side
    43,625.66x = 1,302,927,263.96
  5. Step 5: Solve for x
    x = 1,302,927,263.96/43,625.66
  6. Step 6: Final answer
    x = 29,866.08

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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.