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Finding the Fourth Proportional to 21,385.80, 32,078.70 and 6,593.40

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Solution

The fourth proportional to 21,385.80, 32,078.70 and 6,593.40 is: 9,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.80 : 32,078.70 = 6,593.40 : x
  2. Step 2: Convert to fraction form
    21,385.80/32,078.70 = 6,593.40/x
  3. Step 3: Cross multiply
    21,385.80x = 32,078.70 × 6,593.40
  4. Step 4: Simplify right side
    21,385.80x = 211,507,700.58
  5. Step 5: Solve for x
    x = 211,507,700.58/21,385.80
  6. Step 6: Final answer
    x = 9,890.10

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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.