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Finding the Fourth Proportional to 55,887.20, 83,828.40 and 18,951.20

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Solution

The fourth proportional to 55,887.20, 83,828.40 and 18,951.20 is: 28,425.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,887.20 : 83,828.40 = 18,951.20 : x
  2. Step 2: Convert to fraction form
    55,887.20/83,828.40 = 18,951.20/x
  3. Step 3: Cross multiply
    55,887.20x = 83,828.40 × 18,951.20
  4. Step 4: Simplify right side
    55,887.20x = 1,588,648,774.08
  5. Step 5: Solve for x
    x = 1,588,648,774.08/55,887.20
  6. Step 6: Final answer
    x = 28,425.99

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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.