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Finding the Fourth Proportional to 17,070.40, 25,621.80 and 10,509.40

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Solution

The fourth proportional to 17,070.40, 25,621.80 and 10,509.40 is: 15,774.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,070.40 : 25,621.80 = 10,509.40 : x
  2. Step 2: Convert to fraction form
    17,070.40/25,621.80 = 10,509.40/x
  3. Step 3: Cross multiply
    17,070.40x = 25,621.80 × 10,509.40
  4. Step 4: Simplify right side
    17,070.40x = 269,269,744.92
  5. Step 5: Solve for x
    x = 269,269,744.92/17,070.40
  6. Step 6: Final answer
    x = 15,774.07

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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.