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Finding the Fourth Proportional to 21,389.64, 32,089.72 and 7,349.88

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Solution

The fourth proportional to 21,389.64, 32,089.72 and 7,349.88 is: 11,026.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.64 : 32,089.72 = 7,349.88 : x
  2. Step 2: Convert to fraction form
    21,389.64/32,089.72 = 7,349.88/x
  3. Step 3: Cross multiply
    21,389.64x = 32,089.72 × 7,349.88
  4. Step 4: Simplify right side
    21,389.64x = 235,855,591.23
  5. Step 5: Solve for x
    x = 235,855,591.23/21,389.64
  6. Step 6: Final answer
    x = 11,026.63

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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.