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Finding the Fourth Proportional to 21,937.63, 32,905.65 and 7,146.16

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Solution

The fourth proportional to 21,937.63, 32,905.65 and 7,146.16 is: 10,718.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,937.63 : 32,905.65 = 7,146.16 : x
  2. Step 2: Convert to fraction form
    21,937.63/32,905.65 = 7,146.16/x
  3. Step 3: Cross multiply
    21,937.63x = 32,905.65 × 7,146.16
  4. Step 4: Simplify right side
    21,937.63x = 235,149,039.80
  5. Step 5: Solve for x
    x = 235,149,039.80/21,937.63
  6. Step 6: Final answer
    x = 10,718.98

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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.