Home / 18,865.64-28,298.52-6,385.79

Finding the Fourth Proportional to 18,865.64, 28,298.52 and 6,385.79

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Solution

The fourth proportional to 18,865.64, 28,298.52 and 6,385.79 is: 9,578.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.64 : 28,298.52 = 6,385.79 : x
  2. Step 2: Convert to fraction form
    18,865.64/28,298.52 = 6,385.79/x
  3. Step 3: Cross multiply
    18,865.64x = 28,298.52 × 6,385.79
  4. Step 4: Simplify right side
    18,865.64x = 180,708,264.54
  5. Step 5: Solve for x
    x = 180,708,264.54/18,865.64
  6. Step 6: Final answer
    x = 9,578.70

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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.