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Finding the Fourth Proportional to 30,720.38, 46,087.88 and 9,943.88

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Solution

The fourth proportional to 30,720.38, 46,087.88 and 9,943.88 is: 14,918.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.38 : 46,087.88 = 9,943.88 : x
  2. Step 2: Convert to fraction form
    30,720.38/46,087.88 = 9,943.88/x
  3. Step 3: Cross multiply
    30,720.38x = 46,087.88 × 9,943.88
  4. Step 4: Simplify right side
    30,720.38x = 458,292,068.02
  5. Step 5: Solve for x
    x = 458,292,068.02/30,720.38
  6. Step 6: Final answer
    x = 14,918.18

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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.