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Finding the Fourth Proportional to 11,318.40, 16,934.40 and 7,430.40

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Solution

The fourth proportional to 11,318.40, 16,934.40 and 7,430.40 is: 11,117.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,318.40 : 16,934.40 = 7,430.40 : x
  2. Step 2: Convert to fraction form
    11,318.40/16,934.40 = 7,430.40/x
  3. Step 3: Cross multiply
    11,318.40x = 16,934.40 × 7,430.40
  4. Step 4: Simplify right side
    11,318.40x = 125,829,365.76
  5. Step 5: Solve for x
    x = 125,829,365.76/11,318.40
  6. Step 6: Final answer
    x = 11,117.24

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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.