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Finding the Fourth Proportional to 43,809.88, 65,720.76 and 14,218.16

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Solution

The fourth proportional to 43,809.88, 65,720.76 and 14,218.16 is: 21,329.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,809.88 : 65,720.76 = 14,218.16 : x
  2. Step 2: Convert to fraction form
    43,809.88/65,720.76 = 14,218.16/x
  3. Step 3: Cross multiply
    43,809.88x = 65,720.76 × 14,218.16
  4. Step 4: Simplify right side
    43,809.88x = 934,428,281.00
  5. Step 5: Solve for x
    x = 934,428,281.00/43,809.88
  6. Step 6: Final answer
    x = 21,329.17

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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.