Home / 18,371.72-25,353.15-9,988.40

Finding the Fourth Proportional to 18,371.72, 25,353.15 and 9,988.40

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Solution

The fourth proportional to 18,371.72, 25,353.15 and 9,988.40 is: 13,784.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.72 : 25,353.15 = 9,988.40 : x
  2. Step 2: Convert to fraction form
    18,371.72/25,353.15 = 9,988.40/x
  3. Step 3: Cross multiply
    18,371.72x = 25,353.15 × 9,988.40
  4. Step 4: Simplify right side
    18,371.72x = 253,237,466.84
  5. Step 5: Solve for x
    x = 253,237,466.84/18,371.72
  6. Step 6: Final answer
    x = 13,784.09

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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.