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Finding the Fourth Proportional to 21,585, 32,378.80 and 6,794.40

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Solution

The fourth proportional to 21,585, 32,378.80 and 6,794.40 is: 10,192.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,585 : 32,378.80 = 6,794.40 : x
  2. Step 2: Convert to fraction form
    21,585/32,378.80 = 6,794.40/x
  3. Step 3: Cross multiply
    21,585x = 32,378.80 × 6,794.40
  4. Step 4: Simplify right side
    21,585x = 219,994,518.72
  5. Step 5: Solve for x
    x = 219,994,518.72/21,585
  6. Step 6: Final answer
    x = 10,192.01

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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.