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Finding the Fourth Proportional to 21,488.65, 32,219.71 and 7,445.41

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Solution

The fourth proportional to 21,488.65, 32,219.71 and 7,445.41 is: 11,163.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.65 : 32,219.71 = 7,445.41 : x
  2. Step 2: Convert to fraction form
    21,488.65/32,219.71 = 7,445.41/x
  3. Step 3: Cross multiply
    21,488.65x = 32,219.71 × 7,445.41
  4. Step 4: Simplify right side
    21,488.65x = 239,888,951.03
  5. Step 5: Solve for x
    x = 239,888,951.03/21,488.65
  6. Step 6: Final answer
    x = 11,163.52

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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.