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Finding the Fourth Proportional to 55,640.40, 83,468.70 and 18,191.40

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Solution

The fourth proportional to 55,640.40, 83,468.70 and 18,191.40 is: 27,289.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,640.40 : 83,468.70 = 18,191.40 : x
  2. Step 2: Convert to fraction form
    55,640.40/83,468.70 = 18,191.40/x
  3. Step 3: Cross multiply
    55,640.40x = 83,468.70 × 18,191.40
  4. Step 4: Simplify right side
    55,640.40x = 1,518,412,509.18
  5. Step 5: Solve for x
    x = 1,518,412,509.18/55,640.40
  6. Step 6: Final answer
    x = 27,289.75

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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.