Home / 18,315.12-25,274.64-9,931.56

Finding the Fourth Proportional to 18,315.12, 25,274.64 and 9,931.56

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Solution

The fourth proportional to 18,315.12, 25,274.64 and 9,931.56 is: 13,705.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315.12 : 25,274.64 = 9,931.56 : x
  2. Step 2: Convert to fraction form
    18,315.12/25,274.64 = 9,931.56/x
  3. Step 3: Cross multiply
    18,315.12x = 25,274.64 × 9,931.56
  4. Step 4: Simplify right side
    18,315.12x = 251,016,603.64
  5. Step 5: Solve for x
    x = 251,016,603.64/18,315.12
  6. Step 6: Final answer
    x = 13,705.43

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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.