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Finding the Fourth Proportional to 21,392.40, 32,069.70 and 8,254.20

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Solution

The fourth proportional to 21,392.40, 32,069.70 and 8,254.20 is: 12,374.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,392.40 : 32,069.70 = 8,254.20 : x
  2. Step 2: Convert to fraction form
    21,392.40/32,069.70 = 8,254.20/x
  3. Step 3: Cross multiply
    21,392.40x = 32,069.70 × 8,254.20
  4. Step 4: Simplify right side
    21,392.40x = 264,709,717.74
  5. Step 5: Solve for x
    x = 264,709,717.74/21,392.40
  6. Step 6: Final answer
    x = 12,374.01

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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.