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Finding the Fourth Proportional to 18,313.06, 25,271.84 and 9,929.38

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Solution

The fourth proportional to 18,313.06, 25,271.84 and 9,929.38 is: 13,702.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,313.06 : 25,271.84 = 9,929.38 : x
  2. Step 2: Convert to fraction form
    18,313.06/25,271.84 = 9,929.38/x
  3. Step 3: Cross multiply
    18,313.06x = 25,271.84 × 9,929.38
  4. Step 4: Simplify right side
    18,313.06x = 250,933,702.66
  5. Step 5: Solve for x
    x = 250,933,702.66/18,313.06
  6. Step 6: Final answer
    x = 13,702.45

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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.