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Finding the Fourth Proportional to 18,124.20, 25,011.90 and 10,166.40

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Solution

The fourth proportional to 18,124.20, 25,011.90 and 10,166.40 is: 14,029.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,124.20 : 25,011.90 = 10,166.40 : x
  2. Step 2: Convert to fraction form
    18,124.20/25,011.90 = 10,166.40/x
  3. Step 3: Cross multiply
    18,124.20x = 25,011.90 × 10,166.40
  4. Step 4: Simplify right side
    18,124.20x = 254,280,980.16
  5. Step 5: Solve for x
    x = 254,280,980.16/18,124.20
  6. Step 6: Final answer
    x = 14,029.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.