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Finding the Fourth Proportional to 43,509.87, 65,264.86 and 11,920.20

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Solution

The fourth proportional to 43,509.87, 65,264.86 and 11,920.20 is: 17,880.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,509.87 : 65,264.86 = 11,920.20 : x
  2. Step 2: Convert to fraction form
    43,509.87/65,264.86 = 11,920.20/x
  3. Step 3: Cross multiply
    43,509.87x = 65,264.86 × 11,920.20
  4. Step 4: Simplify right side
    43,509.87x = 777,970,184.17
  5. Step 5: Solve for x
    x = 777,970,184.17/43,509.87
  6. Step 6: Final answer
    x = 17,880.32

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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.