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Finding the Fourth Proportional to 30,720.48, 46,077.48 and 9,939.12

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Solution

The fourth proportional to 30,720.48, 46,077.48 and 9,939.12 is: 14,907.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.48 : 46,077.48 = 9,939.12 : x
  2. Step 2: Convert to fraction form
    30,720.48/46,077.48 = 9,939.12/x
  3. Step 3: Cross multiply
    30,720.48x = 46,077.48 × 9,939.12
  4. Step 4: Simplify right side
    30,720.48x = 457,969,603.02
  5. Step 5: Solve for x
    x = 457,969,603.02/30,720.48
  6. Step 6: Final answer
    x = 14,907.63

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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.