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Finding the Fourth Proportional to 18,368.40, 25,347.69 and 9,984.90

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Solution

The fourth proportional to 18,368.40, 25,347.69 and 9,984.90 is: 13,778.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.40 : 25,347.69 = 9,984.90 : x
  2. Step 2: Convert to fraction form
    18,368.40/25,347.69 = 9,984.90/x
  3. Step 3: Cross multiply
    18,368.40x = 25,347.69 × 9,984.90
  4. Step 4: Simplify right side
    18,368.40x = 253,094,149.88
  5. Step 5: Solve for x
    x = 253,094,149.88/18,368.40
  6. Step 6: Final answer
    x = 13,778.78

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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.