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Finding the Fourth Proportional to 14,835.20, 20,470.80 and 8,865.50

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Solution

The fourth proportional to 14,835.20, 20,470.80 and 8,865.50 is: 12,233.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,835.20 : 20,470.80 = 8,865.50 : x
  2. Step 2: Convert to fraction form
    14,835.20/20,470.80 = 8,865.50/x
  3. Step 3: Cross multiply
    14,835.20x = 20,470.80 × 8,865.50
  4. Step 4: Simplify right side
    14,835.20x = 181,483,877.40
  5. Step 5: Solve for x
    x = 181,483,877.40/14,835.20
  6. Step 6: Final answer
    x = 12,233.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.