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Finding the Fourth Proportional to 18,368.40, 25,348.08 and 9,984.84

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Solution

The fourth proportional to 18,368.40, 25,348.08 and 9,984.84 is: 13,778.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.40 : 25,348.08 = 9,984.84 : x
  2. Step 2: Convert to fraction form
    18,368.40/25,348.08 = 9,984.84/x
  3. Step 3: Cross multiply
    18,368.40x = 25,348.08 × 9,984.84
  4. Step 4: Simplify right side
    18,368.40x = 253,096,523.11
  5. Step 5: Solve for x
    x = 253,096,523.11/18,368.40
  6. Step 6: Final answer
    x = 13,778.91

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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.