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Finding the Fourth Proportional to 21,387.65, 32,080.92 and 5,804.87

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Solution

The fourth proportional to 21,387.65, 32,080.92 and 5,804.87 is: 8,707.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.65 : 32,080.92 = 5,804.87 : x
  2. Step 2: Convert to fraction form
    21,387.65/32,080.92 = 5,804.87/x
  3. Step 3: Cross multiply
    21,387.65x = 32,080.92 × 5,804.87
  4. Step 4: Simplify right side
    21,387.65x = 186,225,409.68
  5. Step 5: Solve for x
    x = 186,225,409.68/21,387.65
  6. Step 6: Final answer
    x = 8,707.15

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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.