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Finding the Fourth Proportional to 28,646.97, 42,960.18 and 9,921.97

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Solution

The fourth proportional to 28,646.97, 42,960.18 and 9,921.97 is: 14,879.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,646.97 : 42,960.18 = 9,921.97 : x
  2. Step 2: Convert to fraction form
    28,646.97/42,960.18 = 9,921.97/x
  3. Step 3: Cross multiply
    28,646.97x = 42,960.18 × 9,921.97
  4. Step 4: Simplify right side
    28,646.97x = 426,249,617.15
  5. Step 5: Solve for x
    x = 426,249,617.15/28,646.97
  6. Step 6: Final answer
    x = 14,879.40

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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.