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Finding the Fourth Proportional to 14,663.20, 20,235.20 and 7,948.80

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Solution

The fourth proportional to 14,663.20, 20,235.20 and 7,948.80 is: 10,969.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,663.20 : 20,235.20 = 7,948.80 : x
  2. Step 2: Convert to fraction form
    14,663.20/20,235.20 = 7,948.80/x
  3. Step 3: Cross multiply
    14,663.20x = 20,235.20 × 7,948.80
  4. Step 4: Simplify right side
    14,663.20x = 160,845,557.76
  5. Step 5: Solve for x
    x = 160,845,557.76/14,663.20
  6. Step 6: Final answer
    x = 10,969.34

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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.