Home / 18,921.18-28,386.27-5,772.72

Finding the Fourth Proportional to 18,921.18, 28,386.27 and 5,772.72

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Solution

The fourth proportional to 18,921.18, 28,386.27 and 5,772.72 is: 8,660.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.18 : 28,386.27 = 5,772.72 : x
  2. Step 2: Convert to fraction form
    18,921.18/28,386.27 = 5,772.72/x
  3. Step 3: Cross multiply
    18,921.18x = 28,386.27 × 5,772.72
  4. Step 4: Simplify right side
    18,921.18x = 163,865,988.55
  5. Step 5: Solve for x
    x = 163,865,988.55/18,921.18
  6. Step 6: Final answer
    x = 8,660.45

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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.