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Finding the Fourth Proportional to 12,590.16, 18,958.40 and 9,326.40

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Solution

The fourth proportional to 12,590.16, 18,958.40 and 9,326.40 is: 14,043.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,590.16 : 18,958.40 = 9,326.40 : x
  2. Step 2: Convert to fraction form
    12,590.16/18,958.40 = 9,326.40/x
  3. Step 3: Cross multiply
    12,590.16x = 18,958.40 × 9,326.40
  4. Step 4: Simplify right side
    12,590.16x = 176,813,621.76
  5. Step 5: Solve for x
    x = 176,813,621.76/12,590.16
  6. Step 6: Final answer
    x = 14,043.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.