Home / 18,931.80-28,373.40-11,528.40

Finding the Fourth Proportional to 18,931.80, 28,373.40 and 11,528.40

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Solution

The fourth proportional to 18,931.80, 28,373.40 and 11,528.40 is: 17,277.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.80 : 28,373.40 = 11,528.40 : x
  2. Step 2: Convert to fraction form
    18,931.80/28,373.40 = 11,528.40/x
  3. Step 3: Cross multiply
    18,931.80x = 28,373.40 × 11,528.40
  4. Step 4: Simplify right side
    18,931.80x = 327,099,904.56
  5. Step 5: Solve for x
    x = 327,099,904.56/18,931.80
  6. Step 6: Final answer
    x = 17,277.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.