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Finding the Fourth Proportional to 14,152.70, 21,216.90 and 7,227.20

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Solution

The fourth proportional to 14,152.70, 21,216.90 and 7,227.20 is: 10,834.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,152.70 : 21,216.90 = 7,227.20 : x
  2. Step 2: Convert to fraction form
    14,152.70/21,216.90 = 7,227.20/x
  3. Step 3: Cross multiply
    14,152.70x = 21,216.90 × 7,227.20
  4. Step 4: Simplify right side
    14,152.70x = 153,338,779.68
  5. Step 5: Solve for x
    x = 153,338,779.68/14,152.70
  6. Step 6: Final answer
    x = 10,834.60

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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.