Home / 18,372.40-25,354.10-9,989.08

Finding the Fourth Proportional to 18,372.40, 25,354.10 and 9,989.08

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Solution

The fourth proportional to 18,372.40, 25,354.10 and 9,989.08 is: 13,785.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.40 : 25,354.10 = 9,989.08 : x
  2. Step 2: Convert to fraction form
    18,372.40/25,354.10 = 9,989.08/x
  3. Step 3: Cross multiply
    18,372.40x = 25,354.10 × 9,989.08
  4. Step 4: Simplify right side
    18,372.40x = 253,264,133.23
  5. Step 5: Solve for x
    x = 253,264,133.23/18,372.40
  6. Step 6: Final answer
    x = 13,785.03

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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.