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Finding the Fourth Proportional to 30,979.76, 46,468.53 and 9,921.11

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Solution

The fourth proportional to 30,979.76, 46,468.53 and 9,921.11 is: 14,881.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,979.76 : 46,468.53 = 9,921.11 : x
  2. Step 2: Convert to fraction form
    30,979.76/46,468.53 = 9,921.11/x
  3. Step 3: Cross multiply
    30,979.76x = 46,468.53 × 9,921.11
  4. Step 4: Simplify right side
    30,979.76x = 461,019,165.33
  5. Step 5: Solve for x
    x = 461,019,165.33/30,979.76
  6. Step 6: Final answer
    x = 14,881.30

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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.